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10. Calico is a coat color found in cats, which is caused by a SEX-LINKED, CODOMINANT allele. (The coloration of calico cats is also the result of the inactivation of one of a female cat's sex chromosomes. In females, two X chromosomes are present in all cells but only one is active, the inactive one is called a BARR BODY. This is why the coat color is random, even among cloned calico cats that have identical genomes.) B = black R = orange BR = calico The following genotypes are possible: Female cats can be black XBXB, orange XRXR, or calico XBXR. Male cats can be black XBY, or orange XRY Show each of the crosses below and determine the percentage of calico offspring from each cross: a. A black male crossed with an orange female x b. An orange male crossed with a calico female x c. A black male crossed with a black female x d. An orange male crossed with an orange female x e. A black male crossed with a calico female x **If you are a cat breeder, what type of parents should you choose to produce the MOST number of calico kittens? male x ____female

          10. Calico is a coat color found in cats, which is caused by a SEX-LINKED, CODOMINANT allele. (The coloration of calico cats is also the result of the inactivation of one of a female cat's sex chromosomes. In females, two X chromosomes are present in all cells but only one is active, the inactive one is called a BARR BODY. This is why the coat color is random, even among cloned calico cats that have identical genomes.)

B = black R = orange BR = calico

The following genotypes are possible:

Female cats can be black XBXB, orange XRXR, or calico XBXR.

Male cats can be black XBY, or orange XRY

Show each of the crosses below and determine the percentage of calico offspring from each cross:

a. A black male crossed with an orange female ______ x ______

b. An orange male crossed with a calico female ______ x ______

c. A black male crossed with a black female ______ x ______

d. An orange male crossed with an orange female ______ x ______

e. A black male crossed with a calico female ______ x ______

**If you are a cat breeder, what type of parents should you choose to produce the MOST number of calico kittens?

________________male x ________________female

Show more…

10. Calico is a coat color found in cats, which is caused by a SEX-LINKED, CODOMINANT allele. (The coloration of calico cats is also the result of the inactivation of one of a female cat's sex chromosomes. In females, two X chromosomes are present in all cells but only one is active, the inactive one is called a BARR BODY. This is why the coat color is random, even among cloned calico cats that have identical genomes.)

B = black R = orange BR = calico

The following genotypes are possible:

Female cats can be black XBXB, orange XRXR, or calico XBXR.

Male cats can be black XBY, or orange XRY

Show each of the crosses below and determine the percentage of calico offspring from each cross:

a. A black male crossed with an orange female x

b. An orange male crossed with a calico female x

c. A black male crossed with a black female x

d. An orange male crossed with an orange female x

e. A black male crossed with a calico female x

**If you are a cat breeder, what type of parents should you choose to produce the MOST number of calico kittens?

male x female

Added by Sharon M.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

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Solved by Expert Kritanta A

01/14/2022

Step 1

Black male (XY) crossed with an orange female (XFXR). The possible offspring are: black male (XY), orange male (XFXR), black female (XBXB), and calico female (XBXR). So, 25% of the offspring could be calico. Show more…

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10. Calico is a coat color found in cats, which is caused by a SEX-LINKED, CODOMINANT allele. (The coloration of calico cats is also the result of the inactivation of one of a female cat's sex chromosomes. In females, two X chromosomes are present in all cells but only one is active, the inactive one is called a BARR BODY. This is why the coat color is random, even among cloned calico cats that have identical genomes.) B = black R = orange BR = calico The following genotypes are possible: Female cats can be black XBXB, orange XRXR, or calico XBXR. Male cats can be black XBY, or orange XRY Show each of the crosses below and determine the percentage of calico offspring from each cross: a. A black male crossed with an orange female ______ x ______ b. An orange male crossed with a calico female ______ x ______ c. A black male crossed with a black female ______ x ______ d. An orange male crossed with an orange female ______ x ______ e. A black male crossed with a calico female ______ x ______ **If you are a cat breeder, what type of parents should you choose to produce the MOST number of calico kittens? ________________male x ________________female

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Transcript

00:01 This video discusses about inheritance of trade.

00:05 Trades are to observe characteristics of an individual.

00:18 These observed characteristics are regulated by the genotype of that individual and since the genes are inherited from the parents, the traits are also inherited from the parent.

00:45 Based on the presence of allee pairs, the traits can be categorized as dominant rate and recessive rate.

01:10 These allele are the variant forms of the same gene.

01:19 And based on what type of alleys are present, the rates are considered as dominant and the dominant traits are the traits that are visible or are said to be expressed in heterozygous condition.

01:42 There as recessive traits are the traits whose expression is masked in heterozygous condition.

01:59 Such traits are only expressed in homozygous condition.

02:14 The traits can also be said to be co -dominant.

02:23 Both the alleles present in heterozygous condition are expressed.

02:39 Thus the alleles are said to be co -dominant if neither of the alleles mask the expression of the other allele.

02:50 Now consider the example of inheritance of fur coat color in the cats.

02:55 Consider that the fur coat color in cats is controlled by two alleles that are b and r.

03:03 The b allele is responsible for black cats whereas the r allele is responsible for orange color fur of the cats.

03:17 In a cat if both b and r alleles are present, then the calcoco -colored cat is observed.

03:25 Since the b and r alleles are co -dominant and are expressed equally to produce the calcico color of the furcon.

03:40 Now consider a cross that is made between a black male with genotype xby and an orange female with genotype xr xr.

04:03 The phenotypic traits of the progeny can be considered by drawing a punith square for the cross.

04:21 From the punith square between the black male and the orange female, it can be observed that two out of the four of springs will express the calcico phenotype...

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