For this experiment you will use Punnett Squares to generate predicted ratios of
ID: 94188 • Letter: F
Question
For this experiment you will use Punnett Squares to generate predicted ratios of genotypes and phenotypes for the F1 and F2 generations under four hypotheses. Assume all parental individuals are homozygous for their allelic combinations (If sex-liked, the male is called hemizygous because he only has one X chromosome) Hypothesis 1: Allele for white eyes is dominant and autosomal. Predicted genotypic and associated phenotypic ratios for F1 and F2 generations: Hypothesis 2: Allele for white eyes is recessive and autosomal. Predicted genotypic and associated phenotypic ratios for Fl and F2 generations: Hypothesis 3: Allele for white eyes is dominant and sex-linked. Predicted genotypic and associated phenotypic ratios for Fl and F2 generations: Hypothesis 4: Allele for white eyes is recessive and sex-linked. Predicted genotypic and associated phenotypic ratios for Fl and F2 generationsExplanation / Answer
Hypothesis 1: Allele for white eyes is dominant and autosomal
Parental genotype: WW and ww
F1 offsprings are all heterozygous white.
F2 generation: Ww x Ww
The phenotypic ratio is 3:1 and genotypic ratio is 1:2:1
Hypothesis 2: Allele for white eyes is recessive and autosomal
Parental genotype: ww and WW
F1 offsprings are all heterozygous and non-white.
F2 generation: Ww x Ww
The phenotypic ratio is 3:1 and genotypic ratio is 1:2:1
Hypothesis 3: Allele for white eyes is dominant and sex-linked
Parental genotype: W and ww
Among F1 offsprings, all females are affected and males are normal
F2 generation: Ww x w-
in F2 generation, among females all have white eyes and half are heterozygous for white eyes. Among males, half have white eye and other half non white eye
Hypothesis 4: Allele for white eyes is recessive and sex-linked
Parental genotype: ww and W-
F1 offsprings, all females are carriers for white eyes and males are normal
F2 generation: Ww x w-
half of female and male in F2 generation have white eyes and the other half of both male and female are normal.
W W w Ww Ww w Ww WwRelated Questions
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