Male cat is either black or orange because of :-

Options

A. Hemizygous - x
B. Heterzygous - x
C. Heterzygous - y
D. Hemizygous - y

Answer

### Step-by-Step Solution:

1. **Understanding Sex Determination in Cats:**
- In mammals, including cats, sex is determined by the presence of specific sex chromosomes. Males have one X and one Y chromosome (XY), while females have two X chromosomes (XX).

2. **Hemizygous Condition:**
- The term "hemizygous" refers to the condition where only one copy of a gene is present in a diploid organism. In the case of male cats, they are hemizygous for genes located on the X chromosome because they have only one X chromosome.

3. **Color Genes on the X Chromosome:**
- The genes responsible for fur color in cats, specifically the orange color, are located on the X chromosome. Since male cats have only one X chromosome, they can only express one color trait: either black or orange.

4. **Color Expression in Male and Female Cats:**
- Female cats, having two X chromosomes, can express both colors (orange and black) if they have one of each type of allele. In contrast, male cats can only express the trait of the single allele they possess on their X chromosome.

5. **Conclusion:**
- Therefore, a male cat can be either black or orange because it is hemizygous for the color genes located on the X chromosome. The presence of only one X chromosome means that the male cat can only express one of the two possible fur colors.

### Final Answer:
A male cat is either black or orange because of its hemizygous condition for the X chromosome, which carries the genes responsible for these fur colors.

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