a. How many genes are involved in producing scales on these fish? ___________________ b. What is going on genetically that explains all of these results? Show your work below.
A student whose hobby is fishing pulled a carp out of Cayuga Lake that was very unusual: it had no scales on its body. She decided to investigate whether this strange “nude” phenotype had a genetic basis. She obtained some inbred carp that were pure-breeding for the wild-type scale pattern in which the fish had scales covering their body. She crosses these wild-type fish with her nude fish. To her surprise, the F1 progeny were wild-type fish and fish with a single, linear row of scales on the sides of their body (i.e. “linear). The ratio of these progeny was 2:1. She then crosses some of her F1 fish and obtains four phenotypes: wildtype, linear, nude and a new phenotype in which the fish had a few scales scattered over their body (i.e. “scattered”). The ratio of these offspring was 6:3:2:1.
a. How many genes are involved in producing scales on these fish? ___________________
b. What is going on genetically that explains all of these results? Show your work below.
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it is a 2:1 ratio !!!!
and the queshtion is not answered
How many genes are involved in producing scales on these fish?
What is going on genetically that explains all of these results? Show your work below.
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