Genetics
JUPEB Biology

In a DNA molecule, adenine always pairs with

A sudden, heritable change in the structure or amount of DNA in an organism is called

The basic unit of heredity that is passed from parent to offspring is the

An organism with the genotype Tt for height is described as

In a monohybrid cross between two heterozygous tall pea plants (Tt × Tt), the expected phenotypic ratio of tall to dwarf offspring is

A heterozygous tall plant (Tt) is crossed with a dwarf plant (tt). What proportion of the offspring is expected to be dwarf?

In a dihybrid cross between two individuals heterozygous for two independently inherited genes (TtRr × TtRr), the expected phenotypic ratio is

In humans, the sex of a child is determined by

A man of blood group A (genotype I$^A$i) marries a woman of blood group B (genotype I$^B$i). Which blood groups are possible among their children?

Two parents are both carriers of the sickle cell trait (genotype AS). What is the probability that a child of theirs will have sickle cell anaemia (SS)?

In the four o'clock plant, a cross between a red-flowered plant and a white-flowered plant produces all pink-flowered offspring. This is an example of

Red-green colour blindness is caused by a recessive allele on the X chromosome. A carrier woman marries a man with normal vision. What proportion of their sons is expected to be colour blind?

Genes are located on:

Mendel's first law is the law of: