Name X and Y.

Diagram 3 shows the hand of a polydactyl. Polydactyl is a genetic disorder and caused by a dominant allele in the autosome.

A heterozygous polydactyl man marries a normal woman. Use D for polydactyl allele and d for normal allele. State the genotype of the polydactyl man and the normal woman.

Diagram 4 shows the inheritance of body colour and size of wing in drosophilia. G represent the dominant allele for grey body while g represent the recessive allele for black body. N represent the dominant allele for normal size wing and n represent the recessive allele for big wing.

State the genotype and phenotype of A.

Diagram 5 shows a cross between a homozygous red flower and tall pea plant with a homozygous white flower and dwarf pea plant.

R represents the dominant allele for red flower while T represents the dominant allele for tall.

What is the phenotype F1 for the pea plant?

Alleles for human blood groups are I^A, I^B and I^O

In a family, Encik Ahmad has O blood group while his wife has AB blood group. State the genotype of Encik Ahmad

Syukri was involved in a serious accident. Aidil volunteer to donate his blood to save Syukri's life.

Why is it safe to transfuse blood group O to an accident victim during an emergency?

State the total chromosome number in a stomata cell for individual P and individual Q.

Diagram 9 shows the karyotypes of individuals P and Q.

Name process R.

What is the number and type of chromosomes inherited by gametes T and V.