Form 4 Science Chapter 5 – Sex Determination and the Occurrence of Twins (Structured Questions 2)

Question 1:
Diagram 1 shows the schematic diagram of sex determination in human being.


(a) In Diagram 1, complete the sex chromosomes in gametes K and L. [2 marks]

(b) What is gamete L? [1 mark]

(c) State process B. [1 mark]

(d) State the sex of offspring M. [1 mark]

(e) Based on Diagram 1, state the percentage to get a baby boy. [1 mark]

Answer:
(a) K : X, L : Y

(b) Sperm

(c) Fertilization

(d) Girl

(e) 50%