In mice, females are XX (ie., 2 X chromosomes) and males are XY.Locus 1: allele E =ears; e = no ears. Locus2: allele B = black hair; b = white. Upper case letter isdominant. Previous research determined that the locus 2 was part ofan X chromosome and locus 1 was part of an autosome. Parents & phenotypes: thisis a reciprocal cross relative to the genotypes and phenotypesdescribed in question 1. Both parents are true-breeding. Theparents mate to produce the F1 generation. The F1-generation micemate to produce the F2 of400 mice.
__ ______________________________________: the genotype andphenotype of the female parent used to make this reciprocalcross.
_________: the expected number of F2-generation mice with whitefur.
_________: the expected number of F2-generation male mice withwhite fur.
_________: the expected number of F2-generation female mice withears and black fur. Show your work.
In mice, females are XX (ie., 2 X chromosomes) and males are XY.Locus 1: allele E =ears; e = no ears. Locus2: allele B = black hair; b = white. Upper case letter isdominant. Previous research determined that the locus 2 was part ofan X chromosome and locus 1 was part of an autosome. Parents & phenotypes: thisis a reciprocal cross relative to the genotypes and phenotypesdescribed in question 1. Both parents are true-breeding. Theparents mate to produce the F1 generation. The F1-generation micemate to produce the F2 of400 mice.
__ ______________________________________: the genotype andphenotype of the female parent used to make this reciprocalcross.
_________: the expected number of F2-generation mice with whitefur.
_________: the expected number of F2-generation male mice withwhite fur.
_________: the expected number of F2-generation female mice withears and black fur. Show your work.
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Traits: tails& hair color in mice. Female are XX (ie., 2 X chromosomes),males are XY. Locus1: allele T = tails; t = no tails. Locus 2: allele B = black hair;b = white. Upper case letter is dominant. Parents & phenotypes: Males= no tails & white; Females = tails & black; bothsexes are true-breeding. F1 phenotypes: All tails &black; 50% male, 50% female. Parents mate & produce F1. The F1mice mate to produce the F2 generation of 800 mice, as per thetable:
______: Which gene locus, tail or hair, is sex-linked (ie., onthe X chromosome)?
(sex)______& (locus) _________: Which sex, male or female,is hemizygous for which gene locus?
# F2 generation mice | Sex | Hair | Tails |
300 | Female | Black | Yes |
100 | Female | Black | No |
150 | Male | Black | Yes |
150 | Male | White | Yes |
50 | Male | Black | No |
50 | Male | White | No |
