Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 12, Problem 2Q
Summary Introduction
To review:
The
Introduction:
In a sexually reproducing organism, each gene is represented by two alleles. The law of segregation suggests that each allele gets dispersed in the offsprings independent of each other. Most of the genetic research has been done on the Drosophila melanogaster.
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Life: The Science of Biology
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- You want to determine whether genes a and b are linked. What cross would you use and why? How would this cross tell you if they are linked?arrow_forwardGiven the karyotype shown at right, is this a male or a female? Normal or abnormal? What would the phenotype of this individual be?arrow_forwardAssuming a typical monohybrid cross in which one allele is completely dominant to the other, what ratio is expected if the F1's are crossed?arrow_forward
- In a mendelian monohbrid cross which generation is always completely heterozygous?arrow_forwardAssuming that the genes are unlinked, what will be the phenotypes of the offspring from the cross above?arrow_forwardIn a cross of EeFfGgHh and EEFfGGhh individuals, what is the probability that an EEffGGhh individual can be produced?arrow_forward
- What is a monohybrid cross, and what are the genotypic andphenotypic ratios expected in the offspring of the cross?arrow_forwardThe following pedigree shows the incidence of ABO blood types in a family. Which individual(s) is/are a known homozygote for blood type? What is/are the possible genotype(s) of individual III-2? What is/are the possible genotype(s) of individual III-3?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_forward
- In the dihybrid cross AaBb ´ aabb, what proportion of individuals are expected to be homozygotic for both genes in the F1generation? sume that in guinea pigs, dark brown fur (B) is dominant to black fur (b). If you mate a homozygous black guinea pig with a heterozygous brown guinea pig, what proportion of the progeny will be black?arrow_forwardExplain why the reciprocal cross yields a different result from the first crossarrow_forwardIn guinea pigs, the gene for black coat color is dominant to the gene for white coat color. What will be the genotypic ratio for the cross between two heterozygous parents?arrow_forward
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