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In a typical Mendelian dihybrid cross, one parent is homozygous for both dominant traits and another parent is homozygous for both recessive traits. In the F2 generation, both parental combinations and recombinants type appear. The phenotypic ratio of parental combinations to recombinants is

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Important Questions on Principles of Inheritance and Variation

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Alleles are:
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Identify the behavior of genes among the following.
A) Segregate at gamete formation, only one of each pair is transmitted to a gamete
B) Independent pairs segregate independently
C) Genes will not be modified at any time
D) Starch synthesis in pea seeds is not controlled by one gene
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
What is incomplete dominance? Explain it with reference to flower colour in snapdragon.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
In his classic experiments on pea plants, Mendel did not use:
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Which among the following characters selected by Mendel in a pea plant is a recessive character?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
State and explain Mendel's law of segregation with the help of a suitable cross.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Among the following characters, which one was not considered by Mendel in his experiments on pea?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Which of the following character is ignored or not noticed by Mendel in garden pea?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
An allele that mask the effect of another allele is called
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Monohybrid cross is a cross of ________.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
According to Mendel, ........................ segregate and ..................... assort independently.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
An individual with genotype AaBbCcddEe is crossed with another individual with genotype AabbCcDdEe. Assuming Mendelian pattern of inheritance, predict the proportion of aabbccddee among the progeny of this cross?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Which one from those given below is the period for Mendel's hybridization experiments?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
The number of contrasting characters studied by Mendel for his experiments was:
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
The allele for black hair (B) is dominant over brown hair (b) and the allele for a brown eye (E) is dominant over blue eye e. Out of the offsprings obtained upon mating a black-haired and brown-eyed individual (BbEe) with a brown-haired and brown-eyed individual bbEE, the ratio of brown-haired and brown-eyed individuals to black-haired and brown-eyed individuals is
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
If F1 hybrid shows characters of both the parents, then it is due to
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Choose the correct statement
I) Alleles are unable to blend with other.
II) Genes are units of inheritance and alleles are slightly different forms of the same genes.
III) Mendel laws could be able to provide physical proof for the existence of genes (factors).
IV) Genes occurs in pairs and one pair segregate independently of another pair.