Skip to main content
Pearson+ LogoPearson+ Logo
Ch. 14 - Mendel and the Gene
All textbooksFreeman 8th EditionCh. 14 - Mendel and the GeneProblem 16b
Previous problem
Next problem

Chapter 14, Problem 16b

You have crossed two Drosophila melanogaster individuals that have long wings and red eyes—the wild-type phenotype. In the progeny, curved wings and lozenge eyes mutant phenotypes appear as follows. Is the lozenge-eyed allele autosomal recessive, autosomal dominant, sex-linked recessive, or sex-linked dominant?

Verified Solution
Video duration:
2m
This video solution was recommended by our tutors as helpful for the problem above.
Was this helpful?

Video transcript

Hello everyone. And in today's video we have the following problem. Need to assume that in my family the mother is a carrier for hemophilia and the father is normal. Their son suffers from hemophilia and the other is normal. A daughter suffers a daughter is a carrier and the other is normal in this case. Yeah. Leo associated with hemophilia is well a great tip to simplify this problem is that genetic disorders or a leo associated with genetic disorders that contain carriers cannot be dominant. The reason for this is that these carriers are people who have an a leo but do not express it for this to happen. The a leo must be recessive So we're going to eliminate all answer choices that have dominant in them because we have found that the L. E. O. Is recessive. So we're left with the genetic disorder with hemophilia is excellent or auto como recessive in this case a great tip to differentiate it to is the auto como genetic disorders. The carriers are going to be anyone. However in excellent genetic disorders the carriers are only going to be females. If we look at our problem we can see that the carriers that we have is the mother and the daughter. These are both females. So the disease is going to be an excellent disease. That is recessive. In this case. The answer choice that represents this is going to be answer choice. A excellent recessive. That is going to be the final answer to a question. I really hope this video helped you
Previous problem
Next problem
Related Practice
Textbook Question

The blending inheritance hypothesis proposed that the genetic material from parents is mixed in the offspring. As a result, traits of offspring and later descendants should lie between the phenotypes of parents. Mendel, in contrast, proposed that genes are discrete and that their integrity is maintained in the offspring and in subsequent generations. Suppose the year is 1890. You are a horse breeder who has just read Mendel's paper. You don't believe his results, however, because you often work with cremello (very light-colored) and chestnut (reddish-brown) horses. You know that when you breed a cremello individual from a pure-breeding line with a chestnut individual from a pure-breeding line, the offspring are palomino—meaning they have an intermediate (golden-yellow) body color. What additional cross would you do to test whether Mendel's model is valid in the case of genes for horse color? According to his model, what offspring phenotype frequencies would you get from your experimental cross? Explain why your cross would test Mendel's model versus blending inheritance.

808
views
Textbook Question

Two mothers give birth to sons at the same time in a busy hospital. The son of couple 1 is afflicted with hemophilia A, which is a recessive X-linked disease. Neither parent has the disease. Couple 2 has a normal son even though the father has hemophilia A. The two couples sue the hospital in court, claiming that a careless staff member swapped their babies at birth. You appear in court as an expert witness. What do you tell the jury? Make a diagram that you can submit to the jury.

855
views
Textbook Question

You have crossed two Drosophila melanogaster individuals that have long wings and red eyes—the wild-type phenotype. In the progeny, curved wings and lozenge eyes mutant phenotypes appear as follows According to these data, is the curved-wing allele autosomal recessive, autosomal dominant, sex-linked recessive, or sex-linked dominant?

631
views
Textbook Question

You have crossed two Drosophila melanogaster individuals that have long wings and red eyes—the wild-type phenotype. In the progeny, curved wings and lozenge eyes mutant phenotypes appear as follows: What is the genotype of the female parent?

363
views
Textbook Question

You have crossed two Drosophila melanogaster individuals that have long wings and red eyes—the wild-type phenotype. In the progeny, curved wings and lozenge eyes mutant phenotypes appear as follows: What is the genotype of the male parent?

516
views