Principles of Inheritance and Variation MCQ Questions & Answers in Botany

341. Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino?

A 25%

B 50%

C 75%

D 100%

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342. A favourite material for the study of mutagenesis at the molecular level is

A TMV

B E.coli

C Drosophila

D Isolated protoplasts of Arabiodopsis thaliana

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343. Body features are

A Phenotype

B Genotype

C Sex of individual

D Controlled by atmosphere

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344. Mendelian ratio 9:3:3:1 is due to

A Law of segregation

B Law of purity of gametes

C Law of independent assortment

D Law of unit characters

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345. Crp-mangnon man was

A Herbivorous

B Fungivorous

C Carnivorous

D Omnivorous

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346. In humans, male $$XXY$$ and female $$XXXX$$ occur due to

A aneuploidy

B euploidy

C autosomal syndrome

D none of these

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347. The genotypes of a husband and wife are I^AI^B and I^Ai. Among the blood types of their children, how many different genotypes and phenotypes are possible?

A 3 genotypes ; 4 phenotypes

B 4 genotypes ; 3 phenotypes

C 4 genotypes ; 4 phenotypes

D 3 genotypes ; 3 phenotypes

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348. On Galapagos island Darwin observed variation in beaks of birds (Darwin's finches) and he concluded

A Interspecies variation

B Intraspecies variation

C Natural selection according to food

D Inheritance of acquired characters

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349. Homo habilis refers to

A Wandering species

B Ancient man

C Modern man

D Tool-maker

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350. Fruit colour in squash in an example of :

A Recessive epistasis

B Dominant epistasis

C Complementary genes

D Inhibitory genes

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341. Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino?

342. A favourite material for the study of mutagenesis at the molecular level is

343. Body features are

344. Mendelian ratio 9:3:3:1 is due to

345. Crp-mangnon man was

346. In humans, male $$XXY$$ and female $$XXXX$$ occur due to

347. The genotypes of a husband and wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?

348. On Galapagos island Darwin observed variation in beaks of birds (Darwin's finches) and he concluded

349. Homo habilis refers to

350. Fruit colour in squash in an example of :

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347. The genotypes of a husband and wife are I^AI^B and I^Ai. Among the blood types of their children, how many different genotypes and phenotypes are possible?