Answer all questions, each carries equal marks: (K/U, TI, C, A) (marks 7X5=35)
1. In pea plants, yellow peas are dominant over green peas. Use a Punnett square to predict thephenotypes and genotypes of the offspring from a cross between a plant heterozygous for yellowpeas (Yy) and a plant homozygous for green peas (yy).
2. Explain why the DNA that makes up two sister chromatids is identical.
3. A probationary nurse mixed up the identification bracelets of three newborn babies. The bloodtypes of parents and babies were obtained in an attempt to identify the parents of each baby.