Inheritance of skin colour in humans is an example of :

(1) chromosomal aberration

(2) point mutation

(3) polygenic inheritance 

(4) codominance

Subtopic:  Polygenic Inheritance & Pleiotropy |
 90%
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NEET - 2007
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Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridised, then F2 segregation will show :

(1) higher number of the recombinant types

(2) segregation in the expected 9 : 3 : 3 : 1 ratio

(3) segregation in 3 : 1

(4) higher number of the parental types

Subtopic:  Dihybrid Cross: Details |
 58%
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NEET - 2007
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A common test to find the genotype or hybrid is by :

(1) crossing of one F2 progeny with male parent

(2) crossing of one F2 progeny with female parent

(3) studying the sexual behaviour of F1 progenies

(4) crossing of one F1 progeny with recessive parent

Subtopic:  Monohybrid Cross: Further Understanding |
 88%
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In pea plants, yellow seeds are dominant to green. If heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green plants would you expect in F1 generation ?

(1) 50 : 50

(2) 9 : 1

(3) 1 : 3

(4) 3 : 1

Subtopic:  Monohybrid Cross: 1 |
 73%
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Which one of the following is the most suitable, medium for culture of Drosophila melanogaster ?

(1) Moist bread

(2) Agar agar

(3) Ripe banana

(4) Cow dung

Subtopic:  Chromosomal Basis of Inheritance: Further Considerations |
 55%
NEET - 2006
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Phenotype of an organism is the result of :

(1) mutations and linkages

(2) cytoplasmic effects and nutrition

(3) environmental changes and sexual dimorphism

(4) genotype and environmental interactions.

Subtopic:  Monohybrid Cross: 1 |
 68%
NEET - 2006
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In which mode of inheritance do you expect more maternal influence among the offspring ?

(1) Autosomal

(2) Cytoplasmic

(3) Y-linked

(4) X-linked

Subtopic:  Sex Determination |
NEET - 2006
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How many different kinds of gametes will be produced by a plant having the genotype AABbCC ?

(1) Three

(2) Four

(3) Nine

(4) Two

Subtopic:  Dihybrid Cross: Details |
 65%
NEET - 2006
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Which one of the following is an example of polygenic inheritance ?

(1) Flower colour in Mirabilis jalapa 

(2) Production of male honey bee

(3) Pod shape in garden pea

(4) Skin colour in humans

Subtopic:  Polygenic Inheritance & Pleiotropy |
 92%
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In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), Yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy ?

1. Only round seeds with green cotyledons

2. Only wrinkled with yellow cotyledons

3. Only wrinkled seeds with green cotyledons

4. Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons.

Subtopic:  Dihybrid Cross Analysis |
 87%
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NEET - 2006
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