NEET Zoology - MCQ Practice Questions

Which of the following is the basic unit of heredity?

What is the chromosome number in a normal human somatic cell?

Which law states that traits are inherited through discrete units?

In a monohybrid cross between two heterozygous individuals (Aa × Aa), what is the probability of homozygous recessive offspring?

Which of the following best describes alleles?

A cross between a homozygous dominant (AA) and homozygous recessive (aa) individual produces offspring that are all:

Gene mutation is defined as:

A cross between a homozygous tall plant (TT) and homozygous dwarf plant (tt) produces F1 generation. When F1 is self-pollinated, the ratio of tall to dwarf plants in F2 will be:

A man with blood group AB marries a woman with blood group O. Their children will have blood groups:

Which of the following evolutionary evidences is based on the study of vestigial structures like human tailbone and wisdom teeth?

In pea plants, yellow seed (Y) is dominant over green (y). If a cross produces 75% yellow and 25% green seeds, what was the genotype of the parents?

A couple plans to have children. The man is a carrier for cystic fibrosis (Aa) and the woman is homozygous normal (AA). What is the probability their child will have cystic fibrosis?

Homologous structures in different species indicate:

In Drosophila, the gene for white eyes (w) is X-linked recessive. A white-eyed female is crossed with a red-eyed male. What will be the phenotype of F1 females?

Which of the following statements about mutations is INCORRECT?

A cross between two pea plants produces offspring in the ratio 1:2:1 for a particular trait. This ratio suggests:

In human genetics, the ABO blood group is determined by multiple alleles. A person with blood type AB has which genotype?

Which evolutionary evidence involves structural similarities between embryos of different species during early development?

Which of the following best describes the Hardy-Weinberg equilibrium principle?

In a dihybrid cross between AaBb × AaBb, what is the probability of obtaining aabb genotype?