Question

(a) Albinism is an inherited condition that results in no pigments being made in the skin.
The allele for albinism is recessive a.
The allele for no albinism is dominant A.
Fig. 7.1 is a pedigree chart diagram of albinism in one family.

(i) Use the information in Fig. 7.1 to state:
            the genotype of person 4 ……………………………………………….
            the genotype of person 1 ……………………………………………….
            the sex chromosomes of person 5. …………………………………………
(ii) A couple without albinism decides to have a child.
Complete the genetic diagram in Fig. 7.2 to calculate the percentage chance of having a child with albinism.

percentage chance of child having albinism = ………………………………………………% 
(b) Mitosis and meiosis are two forms of cell division.
(i) State two roles of mitosis.
1 …………………………………………………………………………
2 ………………………………………………………………………..
(ii) State the name of one organ in the human body where meiosis occurs.
(iii) An organism has 32 chromosomes.
State the number of chromosomes in a cell formed by meiosis in this organism.