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A plant that is heterozygous for two genes was selfed. A total of 1000 seeds were collected. Find out the total number of seeds heterozygous for the first gene and homozygous for the second gene.

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Important Questions on Principles of Inheritance and Variation

EASY
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.
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
In his classic experiments on pea plants, Mendel did not use:
EASY
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?
EASY
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
EASY
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.
EASY
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?
EASY
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?
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
An allele that mask the effect of another allele is called
EASY
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?
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Monohybrid cross is a cross of ________.
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
According to Mendel, ........................ segregate and ..................... assort independently.
EASY
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?
EASY
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?
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
The number of contrasting characters studied by Mendel for his experiments was:
EASY
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?
EASY
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
EASY
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.