ANIMAL BIOTECHNOLOGY CHROMOSOMES QUIZ

Bar eye character of Drosophila is due to

due to presence of additional X-chromosome

duplication in region of 16A of X chromosome

due to a point mutation in eye-locus

deletion in region of 16A of X chromosome

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Exchange of segments between non homologous chromosomes is best known as

translation

crossing over

translocation

recombination

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How many chromosomes are there in the budding yeast (S. cerevisiae)?

16

18

20

17

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Raphanobrassica is a classical example of

None of these

aneuploidy

allopolyploidy

nullisomy

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Which of the following denotes a pair of contrasting characters?

Phenotype

Alleles

Genotype

Homozygous

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The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as

expressivity

inheritance strength

environmental influence

penetrance

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How does dosage compensation in Drosophila occur?

Chimerism

Hypotranscription of female X chromosome

X inactivation in females

Hypertranscription of male X chromosome

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If two genes show 50% recombination

both (a) and (b)

they are on same chromosome but far apart

they are closely located on the same chromosome

they are on different chromosomes

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Transmission of a gene from male parent to female child to male grand child is known as

quantitative inheritance

criss-cross inheritance

holandric inheritance

maternal inheritance

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In a dihybrid cross, the progeny of an Fl individual (hetero2ygous for both characters) will show a phenotypic ratio of

1:1:1:1

3:1:1:3

1:2:2:1

9:3:3:1

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