a. Trace the path a male gamete takes to fertilise a female gamete after being released from the penis. 

a. Male gamete (sperm) travels in the female reproductive tract after being released. The path which it takes to fertilise the female gamete (egg) is vagina uterus fallopian tube resulting in a zygote; Alternatively accept the labelled figure of human female reproductive system indicating the passage of sperm from vagina  to uterus and then to fallopian tube for fertilisation resulting in a zygote; 

b. Zygote has 2 sets of chromosomes / alternatively accept 2n.