Monohar Pandey Solutions for Exercise 2: Exercise 2

Which one among the following is not correct about Down's syndrome?

Assertion (A) Sex chromatin body is an inactivation of one X-chromosome in diploid females.
Reason (R) Sex chromatin is simply called Barr body.

A diseased man marries a normal woman and they get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is

Match List 1 (Genetic Disease) with List II (Causes)
     List I                                              List II
A. Duchene-muscular dystrophy   1. Autosomal recessive
B. Hypertrichosis                           2. Autosomal dominant
C. Tay-Sach's disease                   3. Y-linked inheritance
D. Nai-Patella syndrome                4. X-Linked inheritance

Consider the following statements
1. Ribosomal RNA derived from nucleolar DNA.
2. Transfer RNA synthesized in nucleus on DNA template.
3. Messenger RNA convey genetic information from DNA of chromosomes to the ribosomes.
Which of the statements given above are correct about RNA?

Which of the following features of DNA make if unequally suited to store and transmit genetic information from generation to generation?

Assertion (A) Mendel worked on garden pea (Pisum sativum).
Reason (R) Garden pea belongs to family- Malvaceae.

Assertion (A) Haemophilia never occurs to women.
Reason (R) Gene for haemophilia are found in X-chromosomes.