Which of the following statements about sickle cell anaemia is correct?
In humans, pointed eyebrows (B) is a dominant trait over smooth eyebrows (b). A student and the mother have smooth eyebrows while the father has pointed eyebrows. What is the genotype of the father?
A woman with Rhesus negative blood group was advised not to marry a man with Rhesus positive blood group because
Which of the following organisms exhibits division of labour?
Natural selection arises as a result of?
