ANIMAL BIOTECHNOLOGY CHROMOSOMES QUIZ

How many chromosomes are there in Caernorhabditis elegans?

9

3

6

12

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If two genes show 50% recombination

they are on different chromosomes

they are on same chromosome but far apart

both (a) and (b)

they are closely located on the same chromosome

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Hairy wing character of Drosophila is due to

due to presence of additional X-chromosome

deletion in region of chromosome

duplication in region of chromosome

due to a point mutation

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Which of the following is correct when a character shows continuous variation assuming a normal distribution?

None of these

Many of the variation is due to fluctuation of climate

It is not controlled genetically

It is governed by many genes with small cumulative effect

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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

1:2:2:1

1:1:1:1

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Exchange of segments between non homologous chromosomes is best known as

translocation

translation

recombination

crossing over

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

karyogram

zymogram

chromogram

idiogram

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The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as

environmental influence

penetrance

expressivity

inheritance percent

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

pericentric inversion

double inversion

inverted inversion

paracentric inversion

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Which of the following denotes a pair of contrasting characters?

Homozygous

Phenotype

Alleles

Genotype

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