15. In fruit flies, Drosophila, the gene for eye color is carried on the X chromosome. The allele for red eyes is dominant over its recessive allele, white eyes. a) Ifa white-eyed female is mated with a red-eyed male, what is the appearance of their offspring? b) If the daughters from this cross are mated with their father, what types of offspring would be expected and the probability of each? Amy Brown Seience

15. In fruit flies, Drosophila, the gene for eye color is carried on the X chromosome. The allele for red eyes is dominant over its recessive allele, white eyes. a) Ifa white-eyed female is mated with a red-eyed male, what is the appearance of their offspring? b) If the daughters from this cross are mated with their father, what types of offspring would be expected and the probability of each? Amy Brown Seience

Name: Number 15 15. In fruit flies, Drosophila, the gene for eye color is ca
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Description: Number 15 15. In fruit flies, Drosophila, the gene for eye color is carried on the X chromosome. The allele for red eyes isdominant over its recessive allele, white eyes.a) If a white-eyed female is mated with a red-eyed male, what is the appearance

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter14: Chromosomes And Human Inheritance

Section: Chapter Questions

Problem 3GP: Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With...

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5. In humans, one type of color-blindness, an inability to distinguish between red and green, is inherited as a sex-linked character on the X chromosome. It is recessive. a) If a color-blind man marries a homozygous normal woman, what chance is there for the children to be color-blind? b) A normal man marries a color-blind woman. Which, if any, of their children are likely to be colorblind? c) Why is it so commonly believed that women cannot be color-blind?
Additional problems (Chapter 4 (Extension of Mendelian Inheritance): 1. In rabbits, coloration of the fur depends on alleles of the gene c. From information given in the chapter, what phenotypes and proportions would be expected from the following crosses: a) CC X cc b) Cc x Cc c) Cc x Ccch d) cc x cc 2. From the information given in the chapter about the ABO blood types, what phenotypes and ratios are expected from the following matings: a) type AB x type O b) Type AB x type B individual whose mother is type O c) Type O x Type A individual whose father is type O d) Type Ox type O 3. A woman with type AB blood type gave birth to a baby with type B blood. Two different men claim to be the father. One has type A blood and the other type B blood. Can the genetic evidence decide in favor of either? 4. You have been studying a trait that seems to be present in every generation within a particular family. Further, you have observed that every affected offspring has at least affected parent…
4. In fruit flies, opaque wing color is due to an X-linked dominant version of a gene. A female with opaque wings mates with a male with opaque wings. Based on this information, which of the following statements is accurate and can be stated with 100% confidence iregarding their offspring? A) female offspring have a 50% chance of having opaque wings B) males are guaranteed to have a 100% chance of having opaque wings C) female offspring cannot have opaque wings D) males are guaranteed to have a 50% chance of having opaque wings E) none of the above statements are completely accurate due to inadequate information provided
3. A man who has polydactyly and normal vision marries a color-blind woman with a normal number of hand and foot digits. The man's father has normal hand and foot digitation, and both the woman's parents have normal hand and foot digitation. A) Polydactyly is autosomal dominant, which means [ Select ] the gene is carried on the X chromosome b. the gene is carried on a non-sex chromosome a. c. the gene is carried on the Y chromosome d. the dominant allele is actually recessive B) Red-green color blindness is X-linked recessive, which means that in females, [ Select ] a. the recessive allele is actually dominant b. the gene is carried on a non-sex chromosome c. the gene must have both recessive alleles to be expressed in the phenotype d. the gene is carried on the Y chromosome C) What proportion of their sons would be color blind and polydactyly? [ Select ] a. half b. none C. one out of four d. all D) What proportion of their daughters would be color blind and polydactyly? [ Select ] а.…
8. While vermilion is X-linked and brightens the eye color, brown is an autosomal recessive mutation that darkens the eye. Flies carrying both mutations lose all pigmentation and are white-eyed. Predict the Fl and F2 results of the following crosses: a) vermilion females X brown males b) brown females X vermilion males
6. In Drosophila melanogaster, the wild-type eye colour is dark red. A pure-breeding mutant strain with white eyes also exists. When reciprocal crosses are made between (i) a white-eyed male a wild-type female, and (ii) a white-eyed female a wild-type male, the progeny are as follows: (1) P: White-eyed male x red-eyed female F1: red-eyed males and females F2: 100 progeny; 27 red-eved males, 24 white-eyed males, 49 red-eyed females (ii) P: red eyed male x white-eyed female F1: white-eyed males and red-eyed females F2: 100 progeny; 23 red-eved males 26 white-eyed males, 28 red-eyed females, 23 white-eyed females. How do you interpret these data?
6. A man with X-linked colorblindness marries a woman with no history of ibba colorblindness in her family. The daughter of this couple marries a normal man noitenmot and ended up hone daughter, and their daughter also marries a normal man. This mont blast couple has already had a child with color blindness. do sri ni novig A) What is the chance that next child will be color blind? B) What is the chance that this last couple will have an affected daughter? (d #50x²50 (
5. A man who is not bald married a non bald female whose mother is bald. A. What is the chance that the couple will have a bald son? B. What is the probability that the couple will have a bald daughter? What is the chance that the couple will have a nonbald daughter? C.
8. In alley cats, the coat color is determined by a gene carried on the X chromosome. Genotypes and color are as follows: b X² Females: xbx=yellow xBxb = calico XBXB = black Males: xby = yellow x³y = black A calico cat has a litter of eight kittens: one yellow male, two black males, two yellow females, and three calico females. What is the color of the father of the litter?
8. The autosomal (not X-linked) gene for brachydactyly, short fingers, is dominant to normal finger length. Assume that a female with brachydactyly in the heterozygous condition is married to a man with normal fingers. What is the probability that(a) their first child will have brachydactyly?(b) their first two children will have brachydactyly?(c) their first child will be a brachydactylous girl?
6. Hemophilia causes severe bleeding from minor wounds. The blood is unable to clot properly because one of the factors necessary for clotting is missing. Hemophilia is an inherited sex-linked recessive disorder transmitted on the X chromosome by mothers to their sons. i) A woman inherited the gene for hemophilia from her mother and marries a man who iş normal and has no hemophilia. What is the possibility that her children can have hemophilia?
2. Hemophilia is an X linked recessive trait. There is a woman who is a carrier for hemophilia and marries a man with hemophilia. a) Complete the Punnett Square (it is a google drawing so you will have to double click it to go to the drawing and type in and around the square. Hold the CONTROL (or Command) button and press the PERIOD button to write a superscript/exponent.) b) What are the possible genotypes of the children? c) Could any of their children have hemophilia? If so, would the child be male or female? Explain your reasoning.