ANIMAL BIOTECHNOLOGY CHROMOSOMES QUIZ

Raphanobrassica is a classical example of

allopolyploidy

nullisomy

None of these

aneuploidy

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Bar eye character of Drosophila is due to

deletion in region of 16A of X chromosome

due to a point mutation in eye-locus

due to presence of additional X-chromosome

duplication in region of 16A of X chromosome

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If two genes show 50% recombination

they are on same chromosome but far apart

both (a) and (b)

they are on different chromosomes

they are closely located on the same chromosome

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How does dosage compensation in Drosophila occur?

Chimerism

Hypotranscription of female X chromosome

Hypertranscription of male X chromosome

X inactivation in females

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Diethyl stilbestrol (DES), a synthetic estrogen causes

All of these

centriole elongation

chromosome lagging

disruption of mitotic spindle

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A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as

a physical map

none of these

a genetic map

a cloning map

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

3:1:1:3

9:3:3:1

1:1:1:1

1:2:2:1

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

17

20

18

16

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Incase of inversion when the inverted segment of chromosome includes centromere, it is known as

paracentric inversion

pericentric inversion

double inversion

inverted inversion

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A diagram depicting chromosomes of haploid set of an organism ordered in a series of decreasing size is known as

zymogram

karyogram

idiogram

chromogram

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