Xiomara

Biology

11 January, 23:48

Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles. However, the child may have a sibling that does not have freckles. Which statement best describes the presence of freckles? 1. Freckles are not determined by DNA. 2. There are two alleles for freckles. 3. There is no dominant allele for freckles. 4. Freckles are determined by two genes instead of by one. If Mendel had crossed a true breeding dominant plant with a true breeding recessive plant, in which of the three generations is the recessive trait visible? 1. F1 generation 2. P generation 3. F1 generation and F2 generation 4. P generation and F2 generation.