Color blindness in men is controlled by a recessive gene located on the X chromosome. Can a brother and sister with color blindness have another normal brother? A. Yes, if the mother is a carrier. B.Yes, if the mother is homozygous. C.Yes, if the father is heterogametic. D.Yes, if the father is a carrier.

Color blindness in men is controlled by a recessive gene located on the X chromosome. Can a brother and sister with color blindness have another normal brother? A. Yes, if the mother is a carrier. B.Yes, if the mother is homozygous. C.Yes, if the father is heterogametic. D.Yes, if the father is a carrier.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 12RQ: In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is...

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Why are males more prone to having x-linked recessive disorders?a. Because the y chromosome is smaller than the x chromosome. b. Because the y chromosome is weaker than the X chromosome c. Because there is a chromosome that will inhibit the eexpression of the defective gene. d. Because there is no other chromosome that will mask the other defective chromosome
How is this trait inherited? A. The trait is epistatic. B. The trait is X-linked. C. The trait is dominant. D. The trait is recessive.
when else do we see a non-Mendelian pattern of inheritance? a)When genes are located on different chromosomes b)When genes are located far away on the same chromosome c)When genes are located close together on the same chromosome
Is it possible for a bald man and a nonbald woman to have a nonbald son and bald daughter? A. Yes, if the father is homozygous and the mother is heterozygous. B. Yes, if both parents are heterozygous. C. No, it is not possible. D. Yes, if the father is heterozygous and the mother is homozygous.
Which observation led Thomas Morgan to realize that the gene for fruit fly eye color was located on a sex chromosome? a. He noticed that only male F2 flies could have white eyes; no females displayed this trait. b. He saw that the F2 generation of flies had the classic 3:1 phenotypic ratio of red eyes to white eyes c. He read it in a biology textbook d. He noticed that only mutant flies had white eyes
In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is the expected outcome? a. all white-eyed male offspring b. all white-eyed female offspring c. all red-eyed offspring d. half white-eyed make offspring
What must be true for a male individual to be a carrier of a Y-linked recessive allele? A. The gene has no other alleles. B. The gene is only expressed in females. C. The gene is silenced on the Y chromosome. D. The gene is also found on the X chromosome.
How are individuals II-1 and II- 2 related? A.They are siblings B.They are married C.They are cousins D.They are not related
What was the hypothesis of the X-linked cross conducted in the lab (between white-eyed female and re-eyed male) with the white mutation in Drosophila and written up in your lab report? A All female offspring will inherit red eyes from their mother because the mutation is X linked recessi B All female offspring will inherit white eyes from their mother because the mutation is X linked recessive. C All male offspring will inherit white eyes from their mother because the mutation is X linked recessive. D All male offspring will inherit red eyes from their mother because the mutation is X linked recessive. E All male offspring will inherit white eyes from their mother because the mutation is X linked dominant.
How are sex-linked recessive phenotypes passed between generations? options: A) From father to son to son. B) From father to daughter to son. C) From father to son to daughter. D) From father to daughter to daughter.
Consider a couple: a woman who is homozygous for a recessive mutation that causes X-linked colorblindness, and a man with full color vision (he does not carry a copy of the mutation). a) What is the probability that a son of this couple will be colorblind? b) What is the probability that a daughter of the couple will be colorblind?
Suppose that two people having free earlobes start a family. Their first child has free earlobes and their sec- ond has attached earlobes.a. What are the genotypes of the parents? ________b. What is the genotype of their first child? ________c. What is the genotype of their second child? ________