The law of Segregation is based on the fact that

(1) The Alleles do not show any blending

(2) There is random fertilization

(3) Gametes are pure for the trait

(4) The zygotes are diploid

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The ultimate source of allelic variation is:

(1) Recombination

(2) Natural selection

(3) Mutation

(4) Drift

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In the case of co-dominance, the F1 generation resembles:

(1) Dominant parent

(2) Recessive parent

(3) Both the parents

(4) None of the parents

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What can the possible blood groups of progeny whose father and mother are of A and B group respectively?

(1) A and B only

(2) AB only

(3) All except O

(4) A, B, AB and O

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Suppose a gene has seven alleles. What would be the number of alleles in an individual at any instant?

(1) 1

(2) 7

(3) 2
(4) 3

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In case of starch synthesis in pea seeds [controlled by B gene], BB homozygotes produce large and round starch grains; bb homozygotes produce smaller and wrinkled starch grains and Heterozygotes produce round seeds of intermediate size. What can be inferred from this observation?

(1) The gene B mutates at a faster rate.

(2) The gene B is easily influenced by the environment

(3) Dominance is not an autonomous feature of a gene or the product that it has information for

(4) Some genes do not follow the law of segregation.

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"When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters". This is the statement of:

(1) Law of Dominance

(2) law of segregation

(3) Law of Independent Assortment

(4) Law of Linkage

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When Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their F1 progeny, the F2 ratio deviated very significantly from the 9:3:3:1 ratio. this can be attributed to the fact that:

(1) The genes are located on X and Y chromosomes

(2) Fruit fly has abnormal chromosomes

(3) The genes are located on the X chromosome

(4) the genes exhibit incomplete dominance

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When the two genes in a dihybrid cross are situated on the same chromosome:

(1) The proportion of parental gene combinations was much higher than the non-parental type

(2) The proportion of parental gene combinations was much lesser than the non-parental type.

(3) The propagation of parental gene combinations was equal to the non-parental type

(4) Only recombinants are formed

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A couple has a daughter. What is the probaility that their next child will be a daughter?

(1) 0 %

(2) 25 %

(3) 50 %

(4) 100 %

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