1 if one parent is heterzygous for type a blood and the other parent is homozygous for type b wh

Step 1: Determine the possible blood types for the children of a heterozygous parent for type A

1 if one parent is heterzygous for type a blood and the...

If one parent is heterozygous for type A blood, and the other parent is homozygous for type B, what are the possible blood types for their children? AB or B, B only, All blood types are possible, AB only. 2. Traits controlled by alleles on the X chromosome are said to be: dominant, recessive, sex-linked, codominant. 3. If an albino (recessive, non-x-linked trait) woman is married to a man with normal coloring and they have an albino child, what is the genotype of the father? heterozygous, homozygous recessive, homozygous dominant, not enough information. 4. Factor V Leiden is an incompletely dominant trait. A person who is heterozygous for the trait will display: the full-blown disorder, some of the characteristics of the disease, but not the full-blown disorder, none of the symptoms of the disorder, but can pass it along to their offspring, none of the characteristics of the disorder and also cannot give it to their offspring. 5. Hemophilia is a sex-linked recessive trait. What would the genotype be for a male with hemophilia? X^N Y, X^N Y, X^n Y, X^N Y^n.

Transcript

0:00 Hello, students.

00:01 So today's question is about one parent which is heterozygous for a blood group and another parent which is homozygous for b blood group.

00:11 And we have to find out the possible blood group that their offspring can have, that their children can have.

00:17 So it can be a, b or b, b only, all blood types are possible and a b only.

00:22 So let's find it out.

00:23 So mother which is mother is heterozygous and the father is homozygous for b.

00:32 Mother is hetero for a blood group.

00:35 So what does it mean to be hetero and homo? in homo it has both the same alleles.

00:43 But in case of if the mother is hetero, it has one recessive allele as well.

00:49 One recessively as well.

00:51 So if this is the genotype of both.

00:53 Them.

00:54 So now gamets are going to be like their gametes are going to be this is ia, this is a small i then i b then i b.

01:08 Now if we look at the possible possible outcomes possible of spring they can have with these blood groups.

01:17 So let's take a look.

01:19 Let's take a look if this is the first now this is the second now this one this one crossing with this one and this one crossing with this one again so let's take a look so i a with the first is the i b i a with i b now is the small i and capital b i b small i b small i i b small i then next one is the ia, i, b.

01:57 We can see that ab, 50 % of the chances are, these two have given us that 50 % the chances are having a -b blood group, a -b group.

02:11 And 50 % are the b.

02:13 50 % are the b because this b is always dominant over this small i.

02:21 So the correct answer is going to be a, b or b only? a, b or b? so first is the correct answer.

02:31 Now moving on to the next question, traits which are controlled by alleles on the x chromosome are dominant, recessive and sex linked.

02:39 So the correct answer is the sex linked dominant.

02:44 Because we know that, we know that x chromosome, x chromosome or y chromosome, whatever.

02:50 So, these chromosomes not only determine the male and female traits, determine male and female traits.

03:04 They are responsible for other characteristics as well.

03:08 They are responsible for other characteristics as well.

03:11 So any gene, any gene that is carried by the sex chromosome, which are responsible for, for sex chromosome, these are known as the sex -linked, sex -linked.

03:28 So, sex -linked is the correct answer.

03:32 Sex -linked is the correct answer.

03:34 Now moving on to the next question, which is albino married to, albino, which is married to the normal coloring male and their child have albino.

03:44 So what could be the genotype of father? so if we say that albino person, which is a female, albino which is the mother and normal person, normal person that is the father.

04:02 But we don't know the genotype of the father.

04:06 But in case of albino, which is a recessive disorder, the genotype of mother is aa.

04:13 It is going to be aa.

04:14 And albino offspring is also going to be a .a.

04:22 A only.

04:24 But we know that both these a, one should be coming from the mother and one should be coming from the father.

04:31 So father should contain at least one a.

04:34 Father should contain at least one small a.

04:38 Because these two a, we can see that here, both these cannot come from the mother alone.

04:44 Cannot come from mother alone.

04:47 Come from mother alone.

04:50 We can say that father.