Inherittance — Biology MCQs (Class 12)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#17 The chromosome pairs in drosophila are
A) 2
B) 3
C) 4
D) 5
#18 In humans, what is the probability that the 2nd child will be a son
A) 1/8
B) 1/4
C) 1/2
D) 1
#19 XY sex chromosomes are found in
A) Human female
B) Drosophila female
C) Earthworm
D) Hen
#20 The inheritance of skin color in man is an example of
A) Linkage
B) Polygenic inheritance
C) Crossing over
D) Multiple alleles
#21 The genotype that results in Rh-ve individual is
A) aa
B) cc
C) dd
D) hh
#22 In a di-hybrid cross of the heterozygote parents in pea plants, involving seed color and shape, the expected ratio of the off springs with yellow wrinkled seeds is
A) 9/16
B) 3/16
C) 1/16
D) 5/16
#23 Which blood group genotype shows co-dominance?
A) IAIA
B) IBIB
C) IAIB
D) IOIO
#24 In the construction of chromosome maps, the evidence is derived mainly from
A) Crossing over values
B) Chromosome behavior during meiosis
C) Electron microscopy
D) Genetic ratio
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