Question

I. In humans, brown eyes (B) are dominant over blue (b). A brown-eyed man marries a blue-eyed woman and they have three children, two of whom are brown-eyed and one of whom is blue-eyed. Draw the Punnett square that illustrates this marriage. What is the man's genotype? What are the genotypes of the children? If blue is recessive, what must the woman's genotype be? If that's her genotype, what kind(s) of gametes (eggs) can she produce? If the man has brown eyes, but has a blue-eyed child, what must his genotype be? If that's his genotype, what kind(s) of gametes (sperm) can he produce? Draw a Punnett square. In humans, freckles are dominant over no freckles. A man with freckles reproduces with a woman with freckles, but the children have no freckles. What chance did each child have for freckles? Draw a Punnett square. In dogs, there is a hereditary deafness caused by a recessive gene, "d." A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, so the owner knows his genotype is either DD or Dd. If the dog's genotype is Dd, the owner does not wish to use him for breeding so that the deafness gene will not be passed on. This can be tested by breeding the dog to a deaf female (dd) - test cross. Draw the Punnett squares to illustrate these two possible crosses. In each case, what percentage/how many of the offspring would be expected to be hearing? deaf? How could you tell the genotype of this male dog? Also, using Punnett square(s), show how two hearing dogs could produce deaf offspring. Draw a Punnett square. In horses, trotter (T) is dominant over pacer (t). A trotter is mated to a pacer, and the offspring is a pacer. Give the genotype of all the horses. (a) In a paternity suit, the man has blood type AB. He could not be the father if the child has what blood type? (b) A child with type O blood is born to a mother with type A blood. What is the genotype of the child? The mother? What are the possible genotypes of the father? In humans, the genes for colorblindness and hemophilia are both located on the X chromosome with no corresponding gene on the Y. These are both recessive alleles. If a man and a woman, both with normal vision, marry and have a colorblind son, draw the Punnett square that illustrates this. If the man dies and the woman remarries to a colorblind man, draw a Punnett square showing the type(s) of children that could be expected from her second marriage. How many/what percentage of each could be expected? Draw Punnett squares. A mother and daughter both have PKU, an autosomal recessive condition. A son does not have PKU. What is the genotype of the father? P = normal, p = PKU A child has the autosomal dominant disease neurofibromatosis. The mother appears unaffected. What is the genotype of the father? Both the husband and the wife have normal vision. The wife gives birth to a color-blind daughter. What can you deduce about the girl's parentage? (Color-blindness is an X-linked trait.) In cats, the alleles for black (XB) and orange (Xb) coat color are carried on the X chromosome. Tortoiseshell cats have both alleles and express both coat colors. (a) If a male black cat mates with a female tortoiseshell cat, predict the possible genotypes of their offspring. (b) Although male tortoiseshell cats are rare, how can their existence be explained? Cystic fibrosis is an autosomal genetic disorder caused by a recessive allele, a. What are the chances that parents with the following genotypes will have a child with the disorder? a. aa X Aa Aa X AA Aa X Aa aa X AA XII. Huntington's disease is an autosomal genetic disorder caused by a dominant allele, A. What are the chances that parents with the following genotypes will have a child with the disorder? a. aa X Aa Aa X AA Aa X Aa aa X AA XIII. Hemophilia is an X-linked genetic disorder caused by a recessive allele, a. What are the chances that parents with the following genotypes will have a child with hemophilia? a. XAXA X XaY XAXa X XaY XaXa X XAY Do male and female children have the same chance of getting the disease? XIV. Determine what is the pattern of inheritance shown (autosomal dominant, autosomal recessive, or X-linked recessive)? Also, identify the genotype of each person.

Name: i in humans brown eyes b are dominant over blue b a brown eyed man marries a blue eyed woman and they have three children two of whom are brown eyed and one of whom is blue eyed draw the pun 00167
Uploaded: 2021-12-20T15:04:41-08:00
Duration: 11 min 54 s
Channel: Danielle Ashley
Description: i in humans brown eyes b are dominant over blue b a brown eyed man marries a blue eyed woman and they have three children two of whom are brown eyed and one of whom is blue eyed draw the pun 00167

If blue is recessive, what must the woman's genotype be?

If that's her genotype, what kind(s) of gametes (eggs) can she produce?

If the man has brown eyes, but has a blue-eyed child, what must his genotype be?

If that's his genotype, what kind(s) of gametes (sperm) can he produce?

Draw a Punnett square.

In humans, freckles are dominant over no freckles. A man with freckles reproduces with a woman with freckles, but the children have no freckles. What chance did each child have for freckles?

Draw a Punnett square.

In dogs, there is a hereditary deafness caused by a recessive gene, "d." A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, so the owner knows his genotype is either DD or Dd. If the dog's genotype is Dd, the owner does not wish to use him for breeding so that the deafness gene will not be passed on. This can be tested by breeding the dog to a deaf female (dd) - test cross. Draw the Punnett squares to illustrate these two possible crosses. In each case, what percentage/how many of the offspring would be expected to be hearing? deaf? How could you tell the genotype of this male dog? Also, using Punnett square(s), show how two hearing dogs could produce deaf offspring.

Draw a Punnett square.

In horses, trotter (T) is dominant over pacer (t). A trotter is mated to a pacer, and the offspring is a pacer. Give the genotype of all the horses.

(a) In a paternity suit, the man has blood type AB. He could not be the father if the child has what blood type?

(b) A child with type O blood is born to a mother with type A blood. What is the genotype of the child? The mother? What are the possible genotypes of the father?

In humans, the genes for colorblindness and hemophilia are both located on the X chromosome with no corresponding gene on the Y. These are both recessive alleles. If a man and a woman, both with normal vision, marry and have a colorblind son, draw the Punnett square that illustrates this. If the man dies and the woman remarries to a colorblind man, draw a Punnett square showing the type(s) of children that could be expected from her second marriage. How many/what percentage of each could be expected?

Draw Punnett squares.

A mother and daughter both have PKU, an autosomal recessive condition. A son does not have PKU. What is the genotype of the father? P = normal, p = PKU

A child has the autosomal dominant disease neurofibromatosis. The mother appears unaffected. What is the genotype of the father?

Both the husband and the wife have normal vision. The wife gives birth to a color-blind daughter. What can you deduce about the girl's parentage? (Color-blindness is an X-linked trait.)

In cats, the alleles for black (XB) and orange (Xb) coat color are carried on the X chromosome. Tortoiseshell cats have both alleles and express both coat colors. (a) If a male black cat mates with a female tortoiseshell cat, predict the possible genotypes of their offspring. (b) Although male tortoiseshell cats are rare, how can their existence be explained?

Cystic fibrosis is an autosomal genetic disorder caused by a recessive allele, a. What are the chances that parents with the following genotypes will have a child with the disorder? a. aa X Aa Aa X AA Aa X Aa aa X AA

XII. Huntington's disease is an autosomal genetic disorder caused by a dominant allele, A. What are the chances that parents with the following genotypes will have a child with the disorder? a. aa X Aa Aa X AA Aa X Aa aa X AA

XIII. Hemophilia is an X-linked genetic disorder caused by a recessive allele, a. What are the chances that parents with the following genotypes will have a child with hemophilia? a. XAXA X XaY XAXa X XaY XaXa X XAY

Do male and female children have the same chance of getting the disease?

XIV. Determine what is the pattern of inheritance shown (autosomal dominant, autosomal recessive, or X-linked recessive)? Also, identify the genotype of each person.

Added by Michael H.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Danielle Ashley

12/20/2021

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Step 1: Determine the genotypes of the parents and children in the Punnett square for the brown-eyed man and blue-eyed woman. Show more…

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I. In humans, brown eyes (B) are dominant over blue (b). A brown-eyed man marries a blue-eyed woman and they have three children, two of whom are brown-eyed and one of whom is blue-eyed. Draw the Punnett square that illustrates this marriage. What is the man's genotype? What are the genotypes of the children? If blue is recessive, what must the woman's genotype be? If that's her genotype, what kind(s) of gametes (eggs) can she produce? If the man has brown eyes, but has a blue-eyed child, what must his genotype be? If that's his genotype, what kind(s) of gametes (sperm) can he produce? Draw a Punnett square. In humans, freckles are dominant over no freckles. A man with freckles reproduces with a woman with freckles, but the children have no freckles. What chance did each child have for freckles? Draw a Punnett square. In dogs, there is a hereditary deafness caused by a recessive gene, "d." A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, so the owner knows his genotype is either DD or Dd. If the dog's genotype is Dd, the owner does not wish to use him for breeding so that the deafness gene will not be passed on. This can be tested by breeding the dog to a deaf female (dd) - test cross. Draw the Punnett squares to illustrate these two possible crosses. In each case, what percentage/how many of the offspring would be expected to be hearing? deaf? How could you tell the genotype of this male dog? Also, using Punnett square(s), show how two hearing dogs could produce deaf offspring. Draw a Punnett square. In horses, trotter (T) is dominant over pacer (t). A trotter is mated to a pacer, and the offspring is a pacer. Give the genotype of all the horses. (a) In a paternity suit, the man has blood type AB. He could not be the father if the child has what blood type? (b) A child with type O blood is born to a mother with type A blood. What is the genotype of the child? The mother? What are the possible genotypes of the father? In humans, the genes for colorblindness and hemophilia are both located on the X chromosome with no corresponding gene on the Y. These are both recessive alleles. If a man and a woman, both with normal vision, marry and have a colorblind son, draw the Punnett square that illustrates this. If the man dies and the woman remarries to a colorblind man, draw a Punnett square showing the type(s) of children that could be expected from her second marriage. How many/what percentage of each could be expected? Draw Punnett squares. A mother and daughter both have PKU, an autosomal recessive condition. A son does not have PKU. What is the genotype of the father? P = normal, p = PKU A child has the autosomal dominant disease neurofibromatosis. The mother appears unaffected. What is the genotype of the father? Both the husband and the wife have normal vision. The wife gives birth to a color-blind daughter. What can you deduce about the girl's parentage? (Color-blindness is an X-linked trait.) In cats, the alleles for black (XB) and orange (Xb) coat color are carried on the X chromosome. Tortoiseshell cats have both alleles and express both coat colors. (a) If a male black cat mates with a female tortoiseshell cat, predict the possible genotypes of their offspring. (b) Although male tortoiseshell cats are rare, how can their existence be explained? Cystic fibrosis is an autosomal genetic disorder caused by a recessive allele, a. What are the chances that parents with the following genotypes will have a child with the disorder? a. aa X Aa Aa X AA Aa X Aa aa X AA XII. Huntington's disease is an autosomal genetic disorder caused by a dominant allele, A. What are the chances that parents with the following genotypes will have a child with the disorder? a. aa X Aa Aa X AA Aa X Aa aa X AA XIII. Hemophilia is an X-linked genetic disorder caused by a recessive allele, a. What are the chances that parents with the following genotypes will have a child with hemophilia? a. XAXA X XaY XAXa X XaY XaXa X XAY Do male and female children have the same chance of getting the disease? XIV. Determine what is the pattern of inheritance shown (autosomal dominant, autosomal recessive, or X-linked recessive)? Also, identify the genotype of each person.

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Transcript

00:01 Hello there.

00:02 I see that you have a long list when it comes down to punta squares and all that.

00:08 So we'll go over each them.

00:09 So let's work with one where they're talking about when it comes down to humans where brown eyes is dominant, blue eyes is recessive.

00:17 And they're talking about a man with brown eyes marrying a woman with blue eyes and how they have three children and two of them have brown eyes while one of them has blue eyes.

00:29 So we're going to draw out each of them so going through each of them we see that the man has a big b little b other words to make it possible for the one child to have blue eyes the outcome for the children would be they'll have a dominant and a dominant eye color and a recessive eye color the mom has two little bees these the mom will give either one little b or another little b or that i might give one big b and one little b.

01:09 So, and this is how the pun square would look.

01:12 The next one, they're talking about a couple that have freckles, but their children have no freckles.

01:19 So what are the chances when it came down to the children? for that to happen, one of them has to have a recessive trait.

01:27 So it was set up like this where like 25 % would have.

01:36 End up not having freckles.

01:40 So, i know it sounds confusing, but that can happen where most of children might seek more with the recessor treat and all.

01:51 So the chances for them not have freckles is 25%.

01:56 So the next one, they're talking about with dogs, heredity, when it comes down to deafness.

02:03 So we did, they asked the question, like, what are the chances? there's like a 50, is a 50 -50 chance that the child, the dogs, the offspring might end up being deaf or not being deaf.

02:15 So we did a setup where if the male dog, where he was just dominant and hearing, and the female dog was recessive.

02:27 So it was like just two thieves where it means that they can hear and they breed with a female dog who is deaf, there's a 100 % chance that the children will end up hearing where it the dog the male dog has one recessive gene for deafness and gets with a female dog that was deaf the chances of the dogs the chances of the dogs being deaf is 50 -50 so the next one they're talking about where am i am i? oh they're talking about horses like ones that trotter and the other ones that pacer and they both get together.

03:14 What is the outcome? you might get an outcome where most, where 100 % of the horses are trotters.

03:25 Oops, i don't know what happened.

03:27 My pen.

03:28 Hold on.

03:31 Okay, come on.

03:33 Okay, trotters.

03:36 So then the next one that they talk about, when they were talking about a paternity suit where a man is basically, saying that this child is not his child because the child's blood type is o, even though the man's blood type is a -b, looking bad.

03:58 So it comes down, that's the only way it would not be possible for this child to be his child, because if his blood type is a -b, where there's no type o, then he cannot have this child.

04:13 So that's what child's genotype would be where for the man who is saying that's not his kid his genotype would look more like this let's make that to a b so then for the mom's genotype she will have an a but a little eye that's recessive for o so that means the man who could possibly be the child's father the man's blood type would have to be either a big a or a big b with a little recessive eye attached to it.

04:53 So, yep.

04:58 Okay, so we're talking about when it comes down to colorblindness and hemophilia.

05:06 And with this one, i just put h, even though that's not the best way.

05:10 I just put h of saying, like, for colorblindness and hemophilia.

05:14 So this section is like, this is with the woman.

05:17 If she ends up with a man who is, if she ends up with a man who doesn't have colorblindness, but she does, i probably shouldn't say 50%.

05:38 The chances of the child might end up having the son having colorblindness, because i realize the mom doesn't have any colorblindness, it'll be like a 25%.

05:51 Because even though the daughter might have it, she has the recessive trait, but since she has a other ex that's good, it balance it out.

06:00 Where if a woman gets with a colorblind man, the chances increase to 50%.

06:07 So these are like two side by side.

06:10 When the woman got with one man who was colorblind and the woman got with the new husband who is colorblind and they have children.

06:24 That's where the chances kind of increased a bit.

06:27 It's been a little too much...

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