Ratio 9:7 is obtained for a dihybrid cross involving

1.  Complementary genes

2.  Codominance

3.  Dupliacting genes

4.  Multiple genes

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4
Correct Answer :

Complementary genes


Explanation :
No Explanation available for this question

In a family,father had a trait but mother did not.All their sons and daughters had this trait.The same trait was found in some granddaughters,though daughters were married to normal persons.In this pedigree the genotypes of father,mother and husbands of daughters are

1.  Father is AA,mother is aa,husbands are aa

2.  Father is AA,mother is aa,and husbands are AA

3.  Father is aa,mother is Aa,husbands are Aa

4.  Father is AA,mother is AA,one husband is Aa and second husband is aa

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4
Correct Answer :

Father is AA,mother is aa,husbands are aa


Explanation :
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Two bean seeds collected from a pod were sown in a pot and kept in a favourable condition.After some time it was observed that one plant has grown ten times the growth of another.This difference may be due to the difference in their

1.  Nutrition

2.  Heredity

3.  Water supply

4.  Temperature

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4
Correct Answer :

Heredity


Explanation :
No Explanation available for this question

Complementary genes were discovered by

1.  Mendel

2.  De Vries

3.  Bateson and Punnet

4.  Morgen

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4
Correct Answer :

Bateson and Punnet


Explanation :
No Explanation available for this question

Monogenetic traits give rise to

1.  Independent assortment of characters

2.  Colourblindness in man

3.  Mendelian segregation

4.  Incomplete dominance

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4
Correct Answer :

Mendelian segregation


Explanation :
No Explanation available for this question

The genetic ratio is termed as

1.  Dominant

2.  Genotype

3.  Phenotype

4.  Alleles

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4
Correct Answer :

Genotype


Explanation :
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Dihybrid plant is

1.  Homozygous

2.  Heterozygous

3.  Both of these

4.  None of these

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4
Correct Answer :

Both of these


Explanation :
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The term genotype was given by

1.  H.J.Muller

2.  W.S.Sutton

3.  W.L.Johannsen

4.  T.H.Morgan

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4
Correct Answer :

W.L.Johannsen


Explanation :
No Explanation available for this question

If a dihybrid for charcter is crossed to a hymozygous recessive individual for the same character,the phenotypic ratio of the progeny would be

1.  1:1:1:1

2.  1:2:1

3.  3:1

4.  13:3

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4
Correct Answer :

1:1:1:1


Explanation :
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If 3n is the number of genotypes where 'n' is the number of different chromosome pairs with each carrying one heterozygous allele,what would be the different genotypes produced by garden pea plant

1.  310

2.  312

3.  314

4.  37

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4
Correct Answer :

37


Explanation :
No Explanation available for this question
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