Question

(a) Albinism is a condition in humans where no pigment is made by the skin.
The allele for no albinism is dominant and represented by the letter A.
The allele for albinism is recessive and represented by the letter a.
(i) Table 4.1 shows some genotypes, phenotypes and descriptions of the genotypes for three people.
Complete Table 4.1.

(ii) Person 2 and person 3 have a child together.
Complete the Punnett square diagram in Fig. 4.1 to show the possible genotypes of the offspring.

(b) Chromosomes carry genetic information.
(i) Complete the definition of the term chromosome.
A chromosome is a thread-like structure of …………………………… ,
carrying genetic information in the form of …………………………… .

(ii) State where chromosomes are found in human cells.

(iii) State the sex chromosomes found in male gametes in humans.
……………………………… or ……………………………… 
(c) State the name of the male gametes in humans.
(d) State the name of the organ where male gametes are produced in humans.