Question

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Understanding Main Ideas
1. A test cross made with a cat that may be het-
erozygous for a recessive trait produces ten kit-
tens, none of which has the trait. What is the
presumed genotype of the cat? Explain.

Answer 1

The presumed genotype of the cat would be homzygous dominant.

What is test-crossing?

Test-crossing involves the crossing of an organism with unknown zygosity with a homzygous recessive version of the same trait.

Thus, the analysis of the resulting offspring will indicate whether the zygosity level of the organism is homzygous or heterozygous.

If the recessive trait shows up in the offspring of the cross, it means that the organism is heterozygous, otherwise, it is homzygous.

Since the recessive trait did not show up in the offspring of the cat that was test-crossed, it means the cat is homzygous dominant.

More on test-crossing can be found here:https://brainly.com/question/2496914

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