CAST PREP 5: MS-LS3-2/ SEP 4

A flower species can produce two different types of colored flowers, Blue flowers and Violet flowers. The Blue color flower is a dominant allele and is represented by (B). The violet color flowers are recessive alleles and are represented by (b). The following punnett square represents the cross between a flower plant with genotype (Bb) and flower plant with genotype (BB).

Hemophilia is a blood disorder, where the blood of individuals who carry this trait are not able to properly clot. This blood disorder can cause excessive external or internal bleeding that can cause injury or damage. This blood disorder is very rare but can be passed down.

A couple chooses to get their genes sequence prior to having a baby and realize that they are both carriers of the hemophilia trait. Parent A had a genotype of Hh and Parent B had a genotype Hh. Since both parents carry a recessive allele h, they want to determine what the chances are that their child will have the recessive trait hh for hemophilia.

Using a punnett square, determine what the genetic variation of the child will be if Parent A had a genotype of Hh and Parent B had a genotype Hh.