(a)[5]
Fill in the table by naming the eye parts and then using the letters on Fig. 4.1 to identify them.
(b(i))[1]
State the term for the way in which a pair of muscles work in opposition to each other.
(b(ii))[1]
State the name of the process that enables the eye to see objects at different distances.
(c)[2]
Explain why the eye cannot easily tell different colours apart when the light level is low.
(d(i))[1]
State the genotype of a heterozygous female carrier.
(d(ii))[1]
State the genotype of a colour-blind male.
(d(iii))[1]
Use the key to finish Fig. 4.2 by drawing the correct symbol for person 13.
(d(iv))[2]
Explain why females 4 and 5 are carriers even though their mother is not a carrier.