
principles of inheritance & variation- Quiz 4
Authored by Brainzyme Edutech
Biology
12th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
An allele is dominant, if it is expressed in –
second generation
homozygous combination
heterozygous combination
both homozygous and heterozygous conditions
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
In Mendel’s experiments the alleles were
codominant
corecessive
dominant-recessive
incompletely dominant
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
In a dihybrid cross between two heterozygotes AaBb x AaBb, if we get 3 : 1 ratio among the offsprings, the reason for this may be
polygenes
linked genes
pleiotropic genes
hypostatic genes.
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Trisomy has a chromosome complement of –
2n – 1
2n + 2
2n + 3
2n + 1
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following genes have similar genotypic effect when present separately but produce different trait after interacting together and give a ratio of 9 : 7 in F2 generation?
Complementary genes
Jumping genes
Duplicate genes
House-keeping genes
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which one of the following is the genotypic ratio in monohybrid cross?
9 : 3 : 3 : 1
1 : 2 : 1
9 : 7
3 : 1
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The combined form of coupling and repulsion is –
crossing over
mutation
linkage
disjunction
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