Question

1. Genetic conditions can be controlled by dominant alleles or by recessive alleles.
(a) Explain one difference between a dominant allele and a recessive allele.
(b) Pedigree analysis can be used to find out if characteristics are controlled by dominant or recessive alleles.
The diagram below shows a family pedigree for albinism. Explain, using information in the pedigree, whether
albinism is controlled by a recessive allele or a dominant allele,​

Answer 1

Answer:

1.Dominant traits are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. Recessive traits are expressed only if both the connected alleles are recessive.

2.f both parents do not have the trait and the child does, it is recessive. If one parent has the trait and the child does or does not, it is dominant.