Principles of Inheritance and Variation MCQ Questions & Answers in Botany

281. Two crosses between the same pair of genotypes or phenotypes in which the source of the gametes are reversed in one cross, is known as

A reverse cross

B test cross

C reciprocal cross

D dihybrid cross

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282. Which of the following is the example of chemical scissors

A ECo - RI

B Hind - III

C Bam - I

D All of the above

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283. Exception to mendel's law is found in flower colourof

A Mirabilis

B Sweet - pea

C Garden-pea

D Beans

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284. Like begets like an important and universal phenomenon of life, is due to

A Eugenics

B Inheritance

C Dominance

D Crossing-over

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285. How many types of gametes are expected from the organism with genotype AABBCC

A One

B Two

C Four

D Eight

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286. At a particular locus, frequency of $$'A'$$ allele is 0.6 and that of $$'a'$$ is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?

A 0.36

B 0.16

C 0.24

D 0.48

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287. The sites in the gene at which the mutations occur with unusually high frequency are referred to as

A Recons

B Palindroms

C Hot spots

D Mutons

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288. An individual with two identical members of a pairof genetic factors is called

A Heteromorphic

B Heterozygote

C Homomorphic

D Homozygote

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289. In Drosophila crossing over occurs in female but not in male. Gene A and B are 10 map unit apart on chromosome. A female Drosophila with genotype AB/ab and male Drosophila with AB genotype AB/ab. How many type of gametes are produced by female and male Drosophila respectively

A 4 types : 2 types

B 2 types : 2 types

C 4 types : 4 types

D 4 types : one types

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290. In Mirabilis red (RR) and white (rr) flower produces pink (Rr) flower. A plant with pink flower is crossed with white flower the expected phenotypic ratioIS

A Red : pink : white (1

B Pink : white (1 : 1)

C Red : pink (1 : 1)

D Red : white (3 : 1)

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281. Two crosses between the same pair of genotypes or phenotypes in which the source of the gametes are reversed in one cross, is known as

282. Which of the following is the example of chemical scissors

283. Exception to mendel's law is found in flower colourof

284. Like begets like an important and universal phenomenon of life, is due to

285. How many types of gametes are expected from the organism with genotype AABBCC

286. At a particular locus, frequency of $$'A'$$ allele is 0.6 and that of $$'a'$$ is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?

287. The sites in the gene at which the mutations occur with unusually high frequency are referred to as

288. An individual with two identical members of a pairof genetic factors is called

289. In Drosophila crossing over occurs in female but not in male. Gene A and B are 10 map unit apart on chromosome. A female Drosophila with genotype AB/ab and male Drosophila with AB genotype AB/ab. How many type of gametes are produced by female and male Drosophila respectively

290. In Mirabilis red (RR) and white (rr) flower produces pink (Rr) flower. A plant with pink flower is crossed with white flower the expected phenotypic ratioIS

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