In cats,the gene for coat color is found on the X chromosome.Shown below is a mass of cells making up an early female cat embryo.The X chromosomes are shown in each cell;this embryo has one orange coat color allele (O)and one black coat color allele (B).Which of the following is ACCURATE about this embryo?
A)It will give rise to a calico cat
B)It will give rise to a black cat,because black is dominant to orange
C)It will give rise to an orange cat,as the paternal chromosomes carrying the black allele will be inactivated
D)Since it is heterozygous,it will give rise to a cat with two Barr bodies in each cell
E)Since it is heterozygous,it will give rise to a calico cat with two Barr bodies in each cell

Question

In cats,the gene for coat color is found on the X chromosome.Shown below is a mass of cells making up an early female cat embryo.The X chromosomes are shown in each cell;this embryo has one orange coat color allele (O)and one black coat color allele (B).Which of the following is ACCURATE about this embryo? 
A)It will give rise to a calico cat 
B)It will give rise to a black cat,because black is dominant to orange 
C)It will give rise to an orange cat,as the paternal chromosomes carrying the black allele will be inactivated 
D)Since it is heterozygous,it will give rise to a cat with two Barr bodies in each cell 
E)Since it is heterozygous,it will give rise to a calico cat with two Barr bodies in each cell

Quizplus · Accepted Answer

In cats, the gene for coat color is located on the X chromosome, and due to X-inactivation, different populations of cells in female cats express different X chromosomes leading to the expression of different coat colors. Since the embryo has one orange coat color allele (O) and one black coat color allele (B), it will give rise to a calico cat, where patches of orange and black color will be observed. Therefore, option A is the correct choice.

In Cats,the Gene for Coat Color Is Found on the X