Introduction To Genetic Analysis
12th Edition
ISBN: 9781319114787
Author: Anthony J.F. Griffiths, John Doebley, Catherine Peichel, David A. Wassarman
Publisher: W. H. Freeman
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Chapter 2, Problem 70P
Summary Introduction
To determine: The probability of all of the mice being black.
Introduction: Albinism is extensive in the animal kingdom and is generated through the deficiency of melanin in the hair, eyes, or skin. Analysis of albinism has chiefly concentrated on humans and mice, and there is limited conducted research on albino echinoderms.
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Genes A, B, and C all assort independently. For the cross AaBbCc X AaBbcc, what fraction of the progeny would be expected to have the ABc phenotype?
Gene “A” and gene “B” are not linked. Each has two alleles. The A allele is dominant over the a allele and the B allele is dominant over the b allele. Answer the following questions about a dihybrid (two-trait) cross.
A) List all of the possible gametes (eggs) that could be produced by an individual with the genotype: aabb
B) List all of the possible gametes (sperm) that could be produced by an individual with the genotype: AaBB
C) Fill out a Punnett square for the dihybrid cross cross between the two individuals listed above (aabb x AaBB). What percent of the offspring from this cross would have the dominant phenotype for both traits?
A, B,D are three independently assorting
genes with their recessive alleles a, b, d
respectively. A cross was made between
individuals of Aa bb DD genotype with aa bb
dd. Explain the type of genotypes of the
offspring
Chapter 2 Solutions
Introduction To Genetic Analysis
Ch. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - Prob. 22PCh. 2 - Prob. 23PCh. 2 - Prob. 24PCh. 2 - Prob. 25PCh. 2 - Prob. 26PCh. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Prob. 37PCh. 2 - Prob. 38PCh. 2 - Prob. 39PCh. 2 - Prob. 40PCh. 2 - Prob. 41PCh. 2 - Prob. 42PCh. 2 - Prob. 43PCh. 2 - Prob. 44PCh. 2 - Prob. 45PCh. 2 - Prob. 46PCh. 2 - Prob. 47PCh. 2 - Prob. 48PCh. 2 - Prob. 49PCh. 2 - Prob. 50PCh. 2 - Prob. 51PCh. 2 - Prob. 52PCh. 2 - Prob. 53PCh. 2 - Prob. 54PCh. 2 - Prob. 55PCh. 2 - Prob. 56PCh. 2 - Prob. 56.1PCh. 2 - Prob. 56.2PCh. 2 - Prob. 56.3PCh. 2 - Prob. 56.4PCh. 2 - Prob. 56.5PCh. 2 - Prob. 56.6PCh. 2 - Prob. 56.7PCh. 2 - Prob. 56.8PCh. 2 - Prob. 56.9PCh. 2 - Prob. 56.10PCh. 2 - Prob. 56.11PCh. 2 - Prob. 56.12PCh. 2 - Prob. 56.13PCh. 2 - Prob. 56.14PCh. 2 - Prob. 56.15PCh. 2 - Prob. 57PCh. 2 - Prob. 58PCh. 2 - Prob. 59PCh. 2 - Prob. 60PCh. 2 - Prob. 61PCh. 2 - Prob. 62PCh. 2 - Prob. 63PCh. 2 - Prob. 64PCh. 2 - Prob. 65PCh. 2 - Prob. 67PCh. 2 - Prob. 68PCh. 2 - Prob. 69PCh. 2 - Prob. 70PCh. 2 - Prob. 71PCh. 2 - Prob. 72PCh. 2 - Prob. 73PCh. 2 - Prob. 74PCh. 2 - Prob. 75PCh. 2 - Prob. 76PCh. 2 - Prob. 77PCh. 2 - Prob. 78PCh. 2 - Prob. 79PCh. 2 - Prob. 80PCh. 2 - Prob. 81PCh. 2 - Prob. 82PCh. 2 - Prob. 83PCh. 2 - Prob. 84PCh. 2 - Prob. 85PCh. 2 - Prob. 86PCh. 2 - Prob. 87PCh. 2 - Prob. 88PCh. 2 - Prob. 89PCh. 2 - Prob. 90PCh. 2 - Prob. 91PCh. 2 - Prob. 1GSCh. 2 - Prob. 2GSCh. 2 - Prob. 3GS
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- In sweet pea, gene C or P alone produces white flowers, the purple color being due to the presence of both of these factors. A white-flowered plant crossed with a purple produces progeny of which 3/8 are purple and 5/8 are white-flowered plants. Give the genotypes of the parents and offspring.arrow_forwardIn the following dihybrid cross: B/b; E/e x B/b; e/e What are the phenotypes of the offspring? 9/16 Black 3/16 brown 4/16 golden 9/16 Brown 3/16 Black 4/16 golden 9/16 Black 3/16 golden 4/16 brown 3/8 Black 1/8 brown 4/8 golden 3/8 golden 4/8 Black 1/8 brownarrow_forwardThe cross between a female white giraffe and a pigmented male resulted in white offspring. What is the genotype of the father? Draw the test cross.arrow_forward
- In sweet peas, gene C or P alone produces white flowers, the purple colour being due to the presence of both these factors. What will be the flower colour of the offsprings of the following crosses, in which genotypes of parents are given;a) A white flowered plant crossed with a purple produces offspring, of which three-eighth are purple and five-eighth white.arrow_forwardA cross between two red flower plants produces 2/3 progeny that are red and1/3 progeny that are yellow. What is the genotype of the red flower? Explain these unexpected ratios.arrow_forwardGene A converts compound A (white) to compound B (blue). Gene B converts compound B to compound C (purple). These compounds determine the color of the individual. In a self cross of AaBb individuals, what proportion of white to purple offspring should be seen? 3 white : 1 purple 3 white : 4 purple 4 white : 3 purple 1 white : 3 purple 4 white : 9 purplearrow_forward
- an individual that is heterozygous for type A blood mates with an individual that has type o blood. what are the predicted genotypic and phenotypic ratios for this cross?arrow_forwardWhat will be the PR and GR of the following crosses? Give also their phenotypes. (Designate your own phenotype for each character) AaBb x aabb AAbb x AaBB AaBb x aaBB AABb x aabbarrow_forwardIn a two factor cross, the longest possible map distance is 50 map units. Explain why this is true. How then can genetic maps show two genes that are 70 map units or more apart?arrow_forward
- In mice, the A allele is dominant for yellow coat color, but AA is lethal. The little a allele gives agouti coat color. Also, CC or Cc is normal, but cc is albino, which is of course epistatic to the A gene, since albino mice are neither yellow nor agouti colored. The cross is AaCc to Aacc. What fractions of mice will you get? (Remember there are 3 phenotypes possible, yellow, agouti, or albino. And you never see dead mice, so you are counting only live progeny). SHOW WORK for credit.arrow_forwardIn mice, there is a yellow strain that when crossed yields 2 yellow:1 black. How could you explain this observation?arrow_forwardGreen color in corn plant is controlled by a pair of genes. Give the genotype and phenotype of the offspring from the following crosses:a. GG x Ggb. Gg x Ggc. Explain why no observes a colorless corn plantarrow_forward
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