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Question : Genetic balance theory for sex determination in Drosophila was proposed by
A. Prof. R. P. Roy
B. H. E. Warmed
C. C.B. Bridges
D. Mc. Chang
Question : What does the term recombination describe?
A. Generation of non-parental gene combination
B. Generation of parental gene combination
C. Generation of internal gene combination
D. All of the above
Question : When is there no possibility of an independent assortment of genes during gametogenesis then What Will be the real ratio of F2 in dihybrid cross?
A. 9 : 3 : 3 : 1
B. 11 : 1 : 1 : 3
C. 12 : 1 : 1 : 2
D. 9 : 3 : 2 : 2
Question : This is a reversal of mutation
A. Spontaneous mutation
B. Zygotic mutation
C. Back mutation
D. Recessive mutation
Question : In this group of plants, the male is heterogametic and the female is homogametic type
A. Gymnosperms
B. Bryophytes
C. pteridophytes
D. angiosperms
Question : In human being sex chromosomal complement is
A. XX – XY
B. XX – XO
C. ZO – ZZ
D. ZW – ZZ
Question : In humans, height shows a lot of variation. It is an example of
A. Multiple alleles
B. Pleiotropic inheritance
C. polygenic inheritance
D. False allelic inheritance
Question : The longer the chromosome of an organism, the more genetic variability it gets from
A. Independent assortment
B. Linkage
C. Crossing over
D. Mutation
Question : Segregation of genes takes place during which phase of cell division?
A. Metaphase
B. Anaphase
C. prophase
D. Embryo formation
Question : Crossing over during meiosis occurs between
A. sister chromatids
B. Non-sister chromatids
C. Centromeres
D. Non-homologous chromosomes
Question : A cross between hybrid and a parent is known as
A. Test cross
B. Back cross
C. Monohybrid cross
D. Reciprocal cross
Question : In a multiple allele system, a gamete possesses
A. 2 alleles
B. 3 alleles
C. one allele
D. several alleles
Question : In Bonellia all larva are genetically and cytologically similar. In this worm, male individuals live in the uterus of females. If a particular larva settles near the proboscis of an adult female, it becomes a male individual. The larva develops free in water it becomes
A. Male individuals
B. Female individuals
C. Inter Sex
D. Super female
Question : Punnet square is used to know
A. the outcome of a cross
B. the probable result of a cross
C. Types of gametes
D. Number of gametes
Question : In T. H. Morgan’s Experiment on Drosophilia, what will be the result when F1 female flies are crossed with double recessive male flies?
A. 83% parental combinations 17% Recombinations
B. 41.5 % parental combinations 58.5% recombinations
C. 60% parental combinations 40 % recombinations
D. 90 % parental combinations 10% Recombinations