Question Bank

Chromosomes are mainly composed of which two components?

What does the term 'Hybrid' mean in genetics?

The study of heredity and variations is called:

In a Punnett square, the horizontal and vertical labels represent:

Which of the following is a recessive trait in humans?

DNA stands for:

Who proposed the double helix model of DNA?

What is the basic unit of DNA?

A cross involving only one pair of contrasting characters is called:

Where are genes located inside a cell?

If a cross is made between two hybrid tall plants (Tt), what percentage of offspring will be dwarf?

Which of these is the correct base pairing in DNA?

How many sex chromosomes are there in a human skin cell?

What is the term for a gene that can only express itself in the homozygous state?

Which of the following determines the sex of a child?

If a homozygous tall plant (TT) is crossed with a homozygous dwarf plant (tt), what will be the genotype of the F1 generation?

A cross between an F1 hybrid and its homozygous recessive parent is called a:

In a dihybrid cross between RRYY (Round Yellow) and rryy (Wrinkled Green), what is the phenotype of the F1 offspring?

How many types of gametes are produced by a plant with the genotype RrYy?

Which of Mendel's laws is based on the results of a dihybrid cross?