Drosophila may be monosomic for chromosome 4, yet remain fertile....

Question

Drosophila may be monosomic for chromosome 4, yet remain fertile. Contrast the F₁ and F₂ results of the following crosses involving the recessive chromosome 4 trait, bent bristles:

monosomic IV, normal bristles x diploid, bent bristles.

Accepted Answer

Hello, everyone and welcome to today's video. Some monas M X which refers to liking a specific copy of a chromosome and try some X, which refers to having an extra copy of chromosome are usually in viable in Drosophila. With the exception of the on chromosome four, the island's gene which is E Y is recessive to normal eye and is found on chromosome four to determine the genotype of the tress atomic or the organism that has one extra copy of chromosome in the f one progeny with when a diplo for female with this genotype is crossed with a triple, triple 04 I M L that has this genotype. And all we're doing here is creating upon a square crossing these male with this female. And that is exactly what we're gonna do here. First, we have the mail that we're going to be putting it on top and we're going to divide it as such because remember that he has an extra copy of chromosome for and once we do that, that is what the male is going to look for or look like. And then here we have the female once we perform this cross, we're going to obtain the following. So as we can see, we have two organisms that are try some IQ or that have an extra copy of chromosome, which we have them here. And the genotype in this case is going to be EY plus E Y plus and then E Y and that is going to be represented by answer choice. They both have the same genotype. So answer B is the only correct answer choice. I really hope this video helped you and hope to see you on the next one.

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing

Drosophila may be monosomic for chromosome 4, yet remain fertile. Contrast the F₁ and F₂ results of the following crosses involving the recessive chromosome 4 trait, bent bristles: monosomic IV, normal bristles x diploid, bent bristles.