List of top Zoology Questions on Genetics asked in TS EAMCET

Study the following and choose the correct statement: I. Sickle cell anemia is due to replacement of glutamic acid in 6th position by valine II. Thalassemia is sex linked disorder due to recessive genes III. Down syndrome is an allosomal disorder IV. Phenylketonuria is due to mutation of the gene-PAH in chromosome 12

Match the following:

Deficiency of the blood clotting factor VIII results in:

If mother is carrier for haemophilia and father is normal, chance of their children to be haemophilic is:

If a colour blind man marries a carrier woman for colour blindness, chances of their children to become colour blind is

Karyotype of Turner's syndrome is

Consider the following statements
Assertion (A): Skin colour in human beings is a polygenic trait.
Reason (R): Human skin colour is controlled by cumulative effect of genes.
The correct answer is

Choose the odd pair

Study the following and choose the correct statements:
I. Haemophilia-A and Haemophilia-B are X-linked disorders due to recessive genes
II. Sickle cell anaemia is caused by a point mutation where valine at 6th position is replaced by glutamic acid
III. Protonopia is red colour blindness
IV. Phenyl ketonuria is an allosomal metabolic genetic disorder

If a gene has four alleles, possible number of genotypes are

Consider the following statements:
Assertion (A): In human beings, Y-linked genes of non-homologous part are called holandric genes
Reason (R): Y-chromosome is present in males only

Choose the correctly matched pair

Study the following and identify the correct statements:
I. The alleles I{A} and I{B} regarding blood groups are dominant over I{O}, and I{A} and I{B} are co-dominant.
II. In some fishes, reptiles and birds, females are heterogametic (ZW) and males are homogametic (ZZ).
III. Genic balance theory states that Y-chromosome is essential for determination of sex in male Drosophila.
IV. Person with O blood group are called universal donors because their RBC contain both antigens A and B.

If one parent has A blood group (homozygous) and the other has B blood group (homozygous), these blood groups are not expected in their children

Assertion (A): In hymenopteran insects, sperms are produced by mitosis.
Reason (R): Male hymenopteran insects are haploid.

Choose the mismatched pair: