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Animal Biotechnology Chromosomes Online Exam Quiz

Important questions about Animal Biotechnology Chromosomes. Animal Biotechnology Chromosomes MCQ questions with answers. Animal Biotechnology Chromosomes exam questions and answers for students and interviews.

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

Options

A : penetrance

B : expressivity

C : inheritance strength

D : environmental influence

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

Options

A : It is governed by many genes with small cumulative effect

B : It is not controlled genetically

C : Many of the variation is due to fluctuation of climate

D : None of the above

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

Options

A : 1:1:1:1

B : 1:2:2:1

C : 9:3:3:1

D : 3:1:1:3

4. Diethyl stilbestrol (DES), a synthetic estrogen causes

Options

A : chromosome lagging

B : disruption of mitotic spindle

C : centriole elongation

D : all of the above

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

Options

A : penetrance

B : expressivity

C : inheritance percent

D : environmental influence

6. An odd number of cross overs in inverted region will result into formation of a dicentric chromatid and acentric chromatid at anaphase I incase of

Options

A : pericentric inversion

B : paracentric inversion

C : double inversion

D : none of these

7. How many chromosomes are there in Caernorhabditis elegans ?

Options

A : 3

B : 6

C : 9

D : 12

8. Which of the following denotes a pair of contrasting characters?

Options

A : Alleles

B : Phenotype

C : Homozygous

D : Genotype

9. If two genes show 50% recombination

Options

A : they are on different chromosomes

B : they are on same chromosome but far apart

C : both (a) and (b)

D : they are closely located on the same chromosome

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

Options

A : paracentric inversion

B : double inversion

C : inverted inversion

D : pericentric inversion

1. Bar eye character of Drosophila is due to

Options

A : duplication in region of 16A of X chromosome

B : deletion in region of 16A of X chromosome

C : due to presence of additional X-chromosome

D : due to a point mutation in eye-locus

1. Exchange of segments between non homologous chromosomes is best known as

Options

A : translation

B : translocation

C : recombination

D : crossing over

2. In an organism, the chromosome number is maintained constant because of

Options

A : independent assortment

B : crossing over

C : DNA duplication

D : synapsis

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

Options

A : 16

B : 17

C : 18

D : 20

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

Options

A : a physical map

B : a genetic map

C : a cloning map

D : none of these

5. Hairy wing character of Drosophila is due to

Options

A : duplication in region of chromosome

B : deletion in region of chromosome

C : due to presence of additional X-chromosome

D : due to a point mutation

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

Options

A : zymogram

B : chromogram

C : idiogram

D : karyogram

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

Options

A : holandric inheritance

B : quantitative inheritance

C : criss-cross inheritance

D : maternal inheritance

8. How does dosage compensation in Drosophila occur?

Options

A : Hypertranscription of male X chromosome

B : Hypotranscription of female X chromosome

C : X inactivation in females

D : Chimerism

9. A cross shaped (+) or a ring involving four chromosomes may be formed during metaphase I in case of

Options

A : translocation heterozygote

B : deficiency

C : haploid organism

D : duplication

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