In the gene locus for eye colour in humans, the allele for brown eye is dominant over the allele for blue eyes. If a homozygous brown-eyed girl has a brother with blue eyes, what are the likely phenotypes of there parents'eye colour (Eye colour is not a sex linked trait)

A. Both parents have blue eyes

B. Their father has blue eyes and their mother has brown eyes

C. both parents have brown eyes

D. Their mother has the blue eyes and their father has the brown eyes

If a woman's genotype is Tt Qq Rr, what would be the gene content of her eggs?

A. TQr, tqr

B. TQR, tqr

C. TqR, tQr

D. tQr, TQR

The sex-linked defect in which very slight cut produces severe bleeding is known as

A. anaesmia

B. anorexia

C. haemophilia

D. haemolysis

A man who has the trait for colour blindness marries a normal woman. What percentage of their children would be sufferers, carriers and normal respectively

A. 25%, 25% and 50%

B. 25%, 50% and 25%

C. 50%, 25% and 25%

D. 25%, 37.5% and 37%

Breathing root is an adaptation for survival in the

A. mangrove swamp

B. desert

C. arboreal habitat

D. savanna

Red coloration on the head of a male lizard helps it to

A. mark is territory

B. camouflage in the enviroment

C. secure its mate

D. defend itself

A phenomenon by which an animal goes into a state of dormancy during the dry season is called

A. hibernation

B. aestivation

C. incubation

D. deactivation

The anatomical evidence usually used in support of the evolutionary relationship among whales, human, birds, and dogs is the possession of

A. thick skin

B. pentadactyl limb

C. tail

D. epidermal structure

The parts used for feeding is labelled

A. I

B. J

C. K

D. L

The mouth part of the insect is adapted for

A. biting and chewing

B. sucking and chewing

C. biting and sucking

D. piercing and sucking