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25% of the offspring will have the recessive genotype for hair colour.
That organism has two recessive alleles for that trait, one from each parent. It will display the recessive trait.
If the parent generation consisted of a homozygous dominant parent and a homozygous recessive parent, then the F1 generation would be 100% heterozygous.
A heterozygous cross.Tt X TtOne homozygous dominant--TTTwo heterozygous dominant---TtOne homozygous recessive--ttAll on a statistical average outcome.
Crossing Yy x Yy yields YY, 2Yy, yy. Since Y is dominant over y, then YY and 2 Yy all result in the same phenotype. Therefore 3/4 of the offspring will resemble their parents.
75% Percent
100 percent
25% of the offspring will have the recessive genotype for hair colour.
That organism has two recessive alleles for that trait, one from each parent. It will display the recessive trait.
To produce a pea plant that only displays the recessive phenotype both of the parents must also have the recessive phenotype. In a four square, if one parent displays the recessive phenotype while the other has the dominant phenotype, one of every four offspring should theoretically receive the recessive phenotype as well, but if you want all offspring to be recessive, both parents must also be recessive. (tt)
If the parent generation consisted of a homozygous dominant parent and a homozygous recessive parent, then the F1 generation would be 100% heterozygous.
May be the parents are heterozygous.So, the percentage for the students to inherit a recessive phenotype from the parents is 25%.
both must be tt or both must be Tt
both must be tt or both must be Tt
A heterozygous cross.Tt X TtOne homozygous dominant--TTTwo heterozygous dominant---TtOne homozygous recessive--ttAll on a statistical average outcome.
Crossing Yy x Yy yields YY, 2Yy, yy. Since Y is dominant over y, then YY and 2 Yy all result in the same phenotype. Therefore 3/4 of the offspring will resemble their parents.
A recessive trait can only be passed along if both parents carry at least one of the recessive genes to the child. If both parents manifest the trait (that is, if both parents have both recessive genes), then the child will manifest (that is, carry both recessive genes and display) the recessive trait. If one parent manifests and the other parent only carries the trait (that is, carries one dominant and one recessive gene) then the child will definitely carry and have a 50% chance of manifesting. If both parents carry the recessive, the child is 25% likely not to carry the trait at all, 50% likely to carry and 25% likely to manifest the trait.