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Biotechnology Objective Questions { Animal Biotechnology Chromosomes }



1. 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
A.pericentric inversion
B.paracentric inversion
C.double inversion
D.none of these
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2. The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as
A.penetrance
B.expressivity
C.inheritance percent
D.environmental influence
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3. Diethyl stilbestrol (DES), a synthetic estrogen causes
A.chromosome lagging
B.disruption of mitotic spindle
C.centriole elongation
D.all of the above
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4. Bar eye character of Drosophila is due to
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
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5. Transmission of a gene from male parent to female child to male grand child is known as
A.holandric inheritance
B.quantitative inheritance
C.criss-cross inheritance
D.maternal inheritance
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6. The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as
A.penetrance
B.expressivity
C.inheritance strength
D.environmental influence
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7. How many chromosomes are there in Caernorhabditis elegans?
A.3
B.6
C.9
D.12
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