What is the number of chromosome pairs in maize $(Zea \ mays)$?

Sickle-cell anemia has not been eliminated from the African population because,........

Presence of a single allele of a character in a diploid organism is known as $:$

Haemolytic jaundice is caused due to a dominant gene but only $10\%$ of the people who carry the gene actually develop the disease. $A$ heterozygous man marries a homozygous normal woman; what proportion of the children would be expected to develop the haemolytic disease?

Which of the following is a placental mammal and not a marsupial?

The science which links heredity with environments is known as: