The reason why some mutations which are harmful do not get eliminated from the gene pool, is that
They have future survival value
They are recessive and carried by heterozygous individuals
They are dominant and show up more frequently
Genetic drift occurs because of a small population area
One of the following is not the types of blood groups or blood factors
$A$ normal woman, whose father had colour blindness, married a normal man. What is the chance of occurrence of colour blindness in the progeny?
Sexual reproducation leads to
The gene which increases the frequency of mutation in other gene is referred to as
When a cross is made between offspring and its parents, it is known as