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9:3:3:1 is the phenotypic ratio of the offspring.
25% of the offspring will have the recessive genotype for hair colour.
The alleles that are passed from parents to offspring
RrYy
In mice the YY genotype is lethal during embryonic development. This means that the mating of heterozygous individuals will produce a ratio of 2:1 Yy to yy offspring.A 'YY' genotype is homozygous dominant for that particular trait. If it is Yy, it will be heterozygous.
What is the ratio of heterozygous offspring to total offspring in the punnett square
The offspring's genotype will be AA. Both parents are homozygous dominant, AA, having only dominant alleles to pass on to their offspring. So each parent can pass on only the dominant allele (A) to its offspring. So the offspring will also be homozygous dominant, AA.
If the parents were AA and AA for example then the phenotype ratio will be 1 A (the dominant allele). The genotype will be 1Aa.
25% of the offspring will have the recessive genotype for hair colour.
What fraction of the offspring of parents each with the genotype KkLlMm will be KKLlMm?
It depends on the parents' genes. If both parent have a Pp genotype, then the offspring has a 25% chance of having a PP genotype. But if both parents have a PP genotype then its 100%.
The alleles that are passed from parents to offspring
If the male parent has genotype AS and the female parent has genotype AA what is the offspring?
RrYy
75 percent
In mice the YY genotype is lethal during embryonic development. This means that the mating of heterozygous individuals will produce a ratio of 2:1 Yy to yy offspring.A 'YY' genotype is homozygous dominant for that particular trait. If it is Yy, it will be heterozygous.
For the two given parents: 1 offspring will have the homozygous genotype: YY 1 offspring will have the homozygous genotype: yy 2 offspring will have the heterozygous genotype: Yy
What is the ratio of heterozygous offspring to total offspring in the punnett square