NEET Zoology - MCQ Practice Questions

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?

A gene has four alleles in a population. If three alleles have frequencies of 0.4, 0.3, and 0.2, what is the frequency of the fourth allele?

In a population at Hardy-Weinberg equilibrium, if the frequency of recessive allele (q) = 0.3, what is the frequency of heterozygous individuals?

A tall plant (genotype unknown) is crossed with a dwarf plant. All offspring are tall. What is the most likely genotype of the tall parent?

Which of the following best represents anagenesis in evolution?

A person is heterozygous for cystic fibrosis (Ff). Their partner is homozygous normal (FF). What is the probability of having an affected child?

In Darwin's theory of natural selection, 'variation' is important because it:

A dihybrid cross (AaBb × AaBb) is performed. What is the probability of getting the recessive phenotype for both traits?

Antibiotic resistance in bacteria develops rapidly due to:

Which genetic concept explains why children of the same parents can have different traits despite inheriting genes from both?

A new species can be defined by reproductive isolation from other species. Which reproductive barrier is exemplified by lions and tigers producing sterile offspring (ligers)?

In human genetics, color blindness (red-green) is X-linked recessive. A color-blind woman has how many copies of the color-blindness allele?

Microevolution differs from macroevolution primarily in that microevolution:

A heterozygous red-eyed Drosophila female (XAXa) is crossed with a white-eyed male (XaY). What percentage of male offspring will have white eyes?

A point mutation in a gene's coding sequence results in UAA instead of CAA. This type of mutation is called:

In a population of 50,000 individuals, if 400 individuals show a recessive trait, calculate the frequency of the dominant allele (assuming Hardy-Weinberg equilibrium).