While vermilion is X-linked in Drosophila and causes the eye colo...

Question

While vermilion is X-linked in Drosophila and causes the eye color to be bright red, brown is an autosomal recessive mutation that causes the eye to be brown. Flies carrying both mutations lose all pigmentation and are white-eyed. Predict the F₁ and F₂ results of the following crosses:

white females x wild-type males

Accepted Answer

Hi everyone. Let's take a look at this practice problem together. Blank Is the gene interaction in which one gene masks the effect of another? What type of interaction occurs where one gene masks the effect of another or is dominant over another gene. So this is a simple term and definition. Um practice type of problem. We just have to know these definitions. So let's take a look at our possible answers. We're going to take a look at B first complementary gene action. So the word complementary means to combine in such a way to enhance the qualities of each other and a complimentary gene action involves two genes that work together to produce a particular phenotype for an organism. And in this type of interaction both genes are necessary. So two genes are necessary in order for the phenotype to occur, this is not one gene masking another. So option B. Is incorrect. Let's take a look at option. See supplementary gene action. This is similar to complementary but supplementary means to complete or enhance something. So a supplementary gene would be an interaction between two genes where one supplements the other gene to enhance the phenotype. This is not part of masking another gene. And so we can eliminate C. As well. Now let's take a look at option a a high prostatic recall the definition of a high prostatic gene. It's a gene whose expression the expression is mast by an episodic gene and this is actually the opposite of what we want we want where one gene masks the effect of another. So we'll eliminate option A. As well. Lastly, let's look at option D. A. Pistol Asus. So epistolary is an event between two genes where the expression of one gene is modified or masked by the expression of another. So in other words, this is our answer. The stasis is the gene interaction in which one gene masks the effect of another. Alright, everyone. I hope you found this helpful and I'll see you for our next practice problem.

Key Concepts

X-linked Inheritance

Autosomal Recessive Inheritance

Punnett Square

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