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Animal Biotechnology Chromosomes

Animal Biotechnology Chromosomes
Diethyl stilbestrol (DES), a synthetic estrogen causes

disruption of mitotic spindle
All of these
centriole elongation
chromosome lagging

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Animal Biotechnology Chromosomes
How does dosage compensation in Drosophila occur?

Hypertranscription of male X chromosome
Hypotranscription of female X chromosome
Chimerism
X inactivation in females

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Animal Biotechnology Chromosomes
How many chromosomes are there in Caernorhabditis elegans?

9
12
3
6

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Animal Biotechnology Chromosomes
Hairy wing character of Drosophila is due to

deletion in region of chromosome
due to a point mutation
due to presence of additional X-chromosome
duplication in region of chromosome

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Animal Biotechnology Chromosomes
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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Animal Biotechnology Chromosomes
Which of the following denotes a pair of contrasting characters?

Genotype
Alleles
Homozygous
Phenotype

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