Principles of Inheritance and Variation MCQ Questions & Answers in Botany

261. When the genotype of an organism is improved by the addition of foreign gene, the process is called

A Tissue culture

B Genetic diversity

C Genetic engineering

D Plastic surgery

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262. In totmato, genotype aabbcc produces lOOg tomatoes and AABBCC produces 160g tomatoes. What is contribution of each polygene in the production of tomatoes

A 10 g

B 20 g

C 30g

D 40g

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263. In a lymphocyte - myeloma type of hybridoma the antibody forming ability is derived from

A Myelomas only

B Lymphocytes only

C Partly from lymphocytes and partly from myelomas

D Myelomas to greater extent and lymphocytes to a lesser extent

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264. Famous palaeonotologist/Palaeobotanist of India was

A P.Maheshwari

B S.R.Kashyap

C B.Sahni

D B.P.Pal

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265. Haemolytic jaundice is due to dominant gene but only 20% of the people develop this disease. A heterozygous man marries a homozygous normal woman. What proportion of the children in population would be expected to have this disorder

A 1/5

B 1/20

C 1/10

D 1/2

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266. Use and disuse theory was proposed by

A Mendel

B Darwin

C Vries

D Lamarck

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267. Allele is the

A Alternate trait of gene pair

B Total number of genes for a trait

C Total number of chromosomes of a haploid set

D Total number of genes present on a chromo-some

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268. Embryological support for evolution was disapproved by

A Alfred Wallace

B Charles Darwin

C Oparin

D Karl Ernst von Baer

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269. The genes for same trait present on non-homologous chromosomes are

A Alleles

B Linked genes

C Multiple alleles

D None of the above

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270. Which of the following are homologous organs

A Wings of birds and Locust

B Wings of birds (Sparrow) and Pectoral fins of fish

C Wings of bat and Butterfly

D Legs of frog and Cockroach

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261. When the genotype of an organism is improved by the addition of foreign gene, the process is called

262. In totmato, genotype aabbcc produces lOOg tomatoes and AABBCC produces 160g tomatoes. What is contribution of each polygene in the production of tomatoes

263. In a lymphocyte - myeloma type of hybridoma the antibody forming ability is derived from

264. Famous palaeonotologist/Palaeobotanist of India was

265. Haemolytic jaundice is due to dominant gene but only 20% of the people develop this disease. A heterozygous man marries a homozygous normal woman. What proportion of the children in population would be expected to have this disorder

266. Use and disuse theory was proposed by

267. Allele is the

268. Embryological support for evolution was disapproved by

269. The genes for same trait present on non-homologous chromosomes are

270. Which of the following are homologous organs

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