List of top Biology Questions on Genetic Disorders asked in CUET (UG)

In the given pedigree chart, ‘P’ is a female suffering from a disease, which is denoted by ‘A’ (dominant allele) and ‘a’ (recessive allele). Find the genotype of ‘P’.

Match List-I with List-II:

List-I	List-II
(A) Thalassemia	(I) 47, XXY
(B) Klinefelter’s syndrome	(II) Sex-linked recessive disorder
(C) Turner’s syndrome	(III) 45, XO
(D) Colour blindness	(IV) Autosomal recessive disease

Of the following statements, which is/are correct?
(A) During incomplete dominance, the modified allele is the dominant allele
(B) In polygenic inheritance, the effect of each allele is additive
(C) A gene is called pleiotropic when it exhibits multiple phenotypic expressions
(D) Mutation means alteration of DNA sequence which ensures change only in the phenotype of an organism
Choose the correct answer from the options given below:

The gene HBB for β-thalassemia is present on which chromosome?

Identify the enzyme used for the isolation of genetic from fungal cells.

Which of the following genetic disorder is not a type of mendelian disorder?

Identify the regions of the transcription unit
Promoter
Sigma Factor
Terminator
The structural gene
Choose the correct answer from the option given below

Match List I with List - II.

LIST I		LIST II
A	Down's syndrome	I	44+XX/XY
B	Klinefelter's syndrome	II	44+XO
C	Turner's syndrome	III	44+ XXY
D	Normal human	IV	45+XX/XY

Choose the correct answer from the options given below