60. When a white eye Drosophila male (X' Y) is crossed to a red eye female (X* X"), in the F2 generation all the females are red eyed and 50% males are white eyed. In a criss cross test, when a white eyed female (X' X)is crossed to a red eye male (X* Y), the Fi generation off spring had white eyed males while the female offspring had red eyes. Instead of crossing of a white eyed female (X' X) to a red eyed male (X*Y), white eye female (X' X) to white eye male (X'Y) is crossed, the F1 generation will have the following phenotypes and genotype. (1) All females have white eye (X'X', X' X) and all males have red eye (XY, X'Y) (2) All females have white eye (X'X', X'X') and 50% males have red eye (X* Y, X'Y) (3) 50% females have white eye (X' X', X*x) and all males have white eye (X Y, X'Y) (4) All females have white eye (X'Y', X'X) andall males have white eye (X' Y, XY)

60. When a white eye Drosophila male (X' Y) is crossed to a red eye female (X* X"), in the F2 generation all the females are red eyed and 50% males are white eyed. In a criss cross test, when a white eyed female (X' X)is crossed to a red eye male (X* Y), the Fi generation off spring had white eyed males while the female offspring had red eyes. Instead of crossing of a white eyed female (X' X) to a red eyed male (XY), white eye female (X' X) to white eye male (X'Y) is crossed, the F1 generation will have the following phenotypes and genotype. (1) All females have white eye (X'X', X' X) and all males have red eye (XY, X'Y) (2) All females have white eye (X'X', X'X') and 50% males have red eye (X Y, X'Y) (3) 50% females have white eye (X' X', X*x) and all males have white eye (X Y, X'Y) (4) All females have white eye (X'Y', X'X) andall males have white eye (X' Y, XY)

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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In Section 12.3, ''Laws of Inheritance," an example of epistasis was given for the summer squash. Cross white WAvYy heterozygotes to prove the phenotypic ratio of 12 white:3 yellow:l green that was given in the text.
In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?
64. In Drosophila normal wings are dominant to curly wings. Heterozygotes have normal wings. Pure breeding normal wing males are mated with pure breeding curly wing females; their offspring are then mated. What is the phenotypic ratio in the F2 generation?a. All offspring have curly wingsb. 1 normal wing offspring: 3 curly wing offspringc. 1 normal wing offspring: 1 curly wing offspringd. 3 normal wing offspring: 1 curly wing offspringe. All offspring have normal wings 65. In gel electrophoresis, DNA fragments migrate toward the _______electrode; the _______the fragment, the faster it moves through the gel.a. negative; smallerb. negative; largerc. positive; smallerd. positive; largere. none of the above
34 a,b Note that the starting heterozygous plant does not have its parents genotypes listed. However, we can determine that the starting heterozygous plant has S,U,tu alleles on one chromosome and s,u,Tu alleles on the other because they are most common combinations in the offspring.
8. In guinea pigs, the allele for black fur (B) is dominant over the allele for white fur (b). Similarly, the allele for straight hair (H) is dominant over the allele for having rough hair (h). Pure breeding rough haired guinea pigs with black fur were crossed with pure breeding straight haired guinea pigs with white fur. a. State the genotype and the phenotype of the F1 individuals produced as a result of this cross.b. Two F1 offspring were mated together. Calculate the expected ratio of phenotypes in the F2 generation.c. Show the completed Punnett square below.
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1. Hair or fur length in cats is controlled by a single, autosomal gene; the short hair-allele is dominant to the allele for long hair. Hair color is produced by a different gene which is located on the X chromosome. One allele for this sex-linked gene produces yellow, while an alternate allele produces black fur color; individualswhich are heterozygous for these alleles are calico or tortiseshell in color.If a long-haired, black male is mated with a calico female homozygous for short hair what kind of kittens will be produced in the Ej generation? Give both genotypes and phenotypes; express the genotypes bothsymbolically and in words. Label answers clearly!!
1. In guinea pigs, black hair (B) is dominant to brown hair (b) and short hair (H) is dominant to long hair (h). A heterozygous black, long-haired guinea pig is crossed with a brown, heterozygous short-haired guinea pig. What percentage of the offspring will be black with long hair?
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