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:

In pea plants, round seeds (R) are dominant over wrinkled seeds (r). If a plant with round seeds is crossed with a wrinkled seed plant and produces 50% round and 50% wrinkled seeds, the genotype of the round seed plant is:

Which of the following represents the correct order of organization in genetic material?

According to the Hardy-Weinberg equation (p² + 2pq + q² = 1), what do p and q represent?

A population of 1000 individuals has 640 individuals with dominant phenotype and 360 with recessive phenotype. The frequency of recessive allele (q) is:

X-linked recessive inheritance patterns typically show:

Haemophilia A is inherited as:

A woman who is a carrier for color blindness (XᴮXᵇ) marries a normal man (XᴮY). What percentage of their sons will be color blind?

Gene mutation is defined as:

Which type of mutation has no effect on the protein produced?

Darwin's concept of natural selection is best explained as:

The phenomenon where an organism develops different phenotypes from the same genotype under different environmental conditions is called:

Which of the following is evidence for evolution?

A population of beetles shows variation in shell color. After a pesticide treatment, dark-colored beetles survive better. This is an example of:

In a gene pool of 500 individuals with allele frequencies p = 0.7 and q = 0.3, how many heterozygous individuals are expected according to Hardy-Weinberg principle?