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Coat color in cats is a codominant trait and is also located on the X chromosome. Cats can be black, orange or calico. A calico cat has black and orange splotches. In order to be calico. the cat must have an allele for the black color and an allele for the orange color. Use a punnett square to show why there are no male calico cats.

Respuesta :

Answer:

The males can only either be black or orange

Explanation:

There can be no male calico because for an offspring to be a calico the two codominant alleles must each be carried on the two X chromosomes and in the males, there is the presence of just one X chromosomes, thus they can either be black or be orange. For the females, the can only be black if they carry the black allele on both X chromosomes, the same goes for the orange.

Parents                          XB            Y

    XB                          XBXB        XBY

    XC                          XCXB       XCY      

XBY- black male

XCY- orange male          

The study of genes and inheritance is called genetics.

The correct answer to the question is due to the presence of the Y chromosome.

What is Co-dominance?

  • When both the dominant and the recessive allele shows their specific character in the F1 generation is called Codominance.

According to the question, the color coat of the cat is a codominant trait and is present on the X chromosome.

The X chromosome is present on the female and the male has the Y chromosome. The father only inherits the Y chromosome to his son.  The color coat gene is present on the X chromosome due to which it can not be transmitted from father to his son.

Parents       GENES          Gametes

Male            XY               X     Y

Female         XX              X      X

The offspring ratio will be XX: XY that is 1: 1

Hence, the correct answer is mentioned above.

For more information about the gene, refer to the link:-

https://brainly.com/question/787658