Question 5 Listen Genes A and B are very close to each other on a chromosome. The dominant allele A is normal pigmentation while the recessive allele a results in albinism The dominant B results in normal size ears, while the recessive allele b results in big ears. You take organisms of genotype Ab/aB and cross them to ones which are ab/ab. Which of the following will be the rarest class of offspring? a) Normal pigmentation, big ears b) Normal pigmentation, normal sized ears c) Albino pigmentation, normal sized ears d) All of the above will be equally likely to occur

Question 5 Listen Genes A and B are very close to each other on a chromosome. The dominant allele A is normal pigmentation while the recessive allele a results in albinism The dominant B results in normal size ears, while the recessive allele b results in big ears. You take organisms of genotype Ab/aB and cross them to ones which are ab/ab. Which of the following will be the rarest class of offspring? a) Normal pigmentation, big ears b) Normal pigmentation, normal sized ears c) Albino pigmentation, normal sized ears d) All of the above will be equally likely to occur

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question 1 You are doing a genetics experiment with the fruit fly. In the "P" generation, you cross two true-breeding flies. The female parent is brown and wingless and the male parent is black with normal wings. All of the flies in the F1 generation are brown and have normal wings. Indicate the alleles associated with dominant phenotypes by uppercase letters and alleles associated with recessive phenotypes by lowercase letters. Assume the genes are not found on a sex chromosome. Indicate the color alleles as "B" and "b" the wing alleles by the letters "N" and "n". a) The genotypes of the flies in the P generation are: female and male. b) The genotype of the flies in the F1 generation is: c) You now take an F1 female and cross her to a true-breeding black, wingless male. This male's genotype is: d) You count 1600 offspring in the F2 generation. If the wing and the color traits were linked and no recombination occurred, you would expect to count: # of brown, winged flies (of the…
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Question 6 Albinism is caused by an autosomal recessive allele that interferes with skin pigmentation in mammals. Two normally pigmented human parents already have an albino boy. They plan to continue to have children until they get a girl. Some or all of this information is important for each of the questions below. a) What is the probability that their next child (currently unborn) will be a girl with albinism? Explain your reasoning. b) What is the probability their first female child will be albino? Explain your reasoning. c) The answer to part (b) is different (and, yes, the answer is different) from the answer to part (a). Explain why. (Hint: it has something to do with the underlined words.)
QUESTION 1 In cats, there is a gene that determines how saturated the coat color is. The full color allele (D) is dominant to dilute color (d). You have a full-colored female cat, Catniss, and want to know if she is homozygous for the D allele or whether she is heterozygous. You decide to perform a test cross to determine the genotype of your cat (you have lots of friends interested in adopting a kitten). Your full-colored cat, Catniss, should be crossed to a male cat with what genotype? Some of the kittens are full-colored and some of the kittens are dilute. What is the genotype of the full-colored kittens? You decide to cross your full-colored cat, Catniss, to a male that is heterozygous for the D gene. The first kitten is born and is full-colored. What is the probability that this kitten is homozygous for the D allele? udy M $ E R 96 5 Antof T Q Search 40 6 Y & 7 C 8 144 ( 9 8 O O P [ delete backspace *40 home num locke 7:08 1/31/2
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QUESTION 1 The picture below represents a G1 cell from a newly discovered species that uses the X/Y sex determination system. Alleles for the different autosomal genes of interest are indicated on the chromosomes, and genes R and T are 16 cM apart. Red lines show maternal chromosomes, and blue lines show paternal chromosomes. Answer the following questions about this individual. R r KK a) Name any two loci in this individual that can result in recombination in the gametes via the process of crossing over. b) What is the sex of this individual? Justify your answer. c) Give the term that will describe the morphology of the that carries the N alleles. d) Provide the genotype of the fertilizing male gamete that produced this individual. e) This individual can produce a pool of different gametes. List any TWO potential gametes that will occur at different frequencies. Give the alleles of each gamete contained within a set of brackets, and indicate the expected frequency (up to two decimals)…
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