Unit 3 Sht_10

Sht 1_10

1. The diagrams below represent parts of the human male and female reproductive systems.

Copy and complete the table below by adding the correct letters, names and functions
of the labelled structures.

b) In your jotter describe the journey the sperm take from testis to fertilisation.

c) What name is given to the cell produced after fertilisation?

d) Describe the site of fertilisation in humans and choose the letter which best represents it.

e) Following fertilisation, the fertilised egg divides into more cells.

i) Name the process by which the egg cells divide.

ii) Compare the DNA content of a fertilised egg cell with an egg cell before fertilisation.

iii) In what form is DNA found in human cells?

iv) What must happen before the fertilised egg cell can divide?

 

2. The table below shows the birth weight of babies born to mother who smoke and mothers who do not smoke.

a) In your jotter, construct a bar chart to show the data for mothers who smoke and mothers who do not.

b) Describe the effect of smoking on the birth weight of babies.

c) Calculate the percentage of mothers who smoke.