How many genome types are present in a typical green plants cell?

(1) More than Five

(2) More than Ten

(3) Two

(4) Three

Subtopic:  Introduction to Genetics: 2 |
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Percentage of recombination between A and B is 9%, A and C is 17%, B and C is 26%, then the arrangement of genes is 

(1) ABC

(2) ACB

(3) BCA

(4) BAC

Subtopic:  Recombination Gene Mapping |
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Which of the following conditions represents a case of co-dominance genes?

(1) A gene expresses itself, suppressing the phenotypic effect of its alleles. 

(2) Genes that are similar in phenotypic effect when present separately, but when together interact to produce a different trait.

(3) Alleles, both of which interact to produce a  trait, which may or may not resemble either of the parental types.

(4) Alleles, each of which produces an independent effect in a heterozygous condition. 

Subtopic:  Dominance Deviation from Mendel: 2 |
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Which of the following disorders are caused due to recessive autosomal mutations?

(1) Turner's syndrome and sickle cell anaemia

(2) Edward's syndrome and Down's syndrome

(3) Cystic fibrosis and phenylketonuria

(4) Alzheimer's disease and Huntington's chorea

Subtopic:  Mendelian Disorders |
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Which of the following is correct ?

(1) Henking discovered the small Y-chromosome.

(2) Drosophila also shows XX-XY sex determination like human.

(3) Birds have ZZ-ZW sex determination, where females are ZZ and males are ZW.

(4) Grasshoppers show XX-XY sex determination. 

Subtopic:  Sex Determination: Further Considerations |
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Which of the following is true for a recessive disease in family A and B?

(1) In family A, both the parents are homozygous recessive.

(2) In family B, both the parents are homozygous dominant.

(3) In family B, both the parents are heterozygous recessive.

(4) In family A, both the parents are heterozygous recessive. 

Subtopic:  Pedigree Analysis: Problem Solving |
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Which of the following occurs due to monosomy of sex chromosome?

(1) Down's syndrome

(2) Turner's syndrome

(3) Haemophilia

(4) Sickle cell anaemia

Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
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In rabbits, the gene for grey fur (G) is dominant over that for black fur (g). In a litter, if 50% rabbits are grey, then the possible parental cross combination is 

(1) GG X Gg

(2) GG X GG

(3) gg X gg

(4) Gg X gg.

Subtopic:  Monohybrid Cross: 1 |
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Barr body is missing in the female suffering from 

(1) Huntington's disease

(2) Tay-sach's disease

(3) Klinefelter's syndrome

(4) Turner's syndrome

Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
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Which is genetically not possible?

(1) Hemophilic father transfers the hemophilic gene to his son

(2) Hemophiic father transfers the hemophilic gene to his daughter

(3) Carrier mother transfers the hemophilic gene to her son

(4) Carrier mother trannsfers the hemophilic gene to her daughter

Subtopic:  Mendelian Disorders: Hemophilia |
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