61.
Assertion (A) Haemophilia never occurs to women.
Reason (R) Gene for haemophilia are found in X-chromosomes.

64.
Assertion (A) Human beings have 23 pair of chromosomes, one of which is the sex chromosomes and the remaining are 22 autosomes. The X-linked disease are related to mutation on a sex chromosomes.
Reason (R) Colour blindness results from a mutation in X-chromosome.

70.
Match List-I (Evolutionists) with List-II (Achievements) and select the correct answer:
List-I List-II
a. Haeckel 1. Emphasized the effects of different environments on isolated forms
b. Wagner 2. Suggested that an inner directive guides the course of evolution mainly independent of the environment
c. Guli 3. Pointed out the inevitability of divergence even without difference in environment
d. Karl Nageli 4. Constructed phylogeny of vertebrates on their embryological development

Read More Section(Gentics and Evoloution)

Each Section contains maximum 100 MCQs question on Gentics and Evoloution. To get more questions visit other sections.