EASY
Earn 100

What is molecular mechanism of crossing over?

Important Questions on Principles of Inheritance and Variation

MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
A plant heterozygous for height and flower colour TtRr are selfed and 1600 of the resulting seeds are planted. If the distance between the loci controlling height and the flower colour is 1 centiMorgan (cM), then how many offsprings are expected to be short with white flower ttrr? 
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
What map unit (Centimorgan) is adopted in the construction of genetic maps?
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
In a dihybrid cross between genes yellow, white and miniature characters, the parental % between yellow and white and recombination % is 92 and 8 respectively, and the cross between white and miniature characters, the recombination is 38% and parental is 62%. Identify the genetic map of these.
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over

Give one significant difference between the following:

Linkage and crossing over

EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance gene was explained by:
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
The number of linkage groups in a sperm and ovum of human is, respectively:
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
How many linkage groups are present in human male?
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over

The percentage of the F2 generation offspring showing parental character for the body colour and eye colour in Morgan's experiment is:

EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
Genetic map is one that
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
The two _____ of a gene pair are located on homologous sites on homologous chromosomes.
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
Which of the following sentences are correct?
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
The distance between two genes in a chromosome is measured in cross-over units which represent
HARD
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parent of coupling type along with its cross repulsion
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
Total number of linkage groups in honeybee is __________
HARD
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over

Fill in the blank with the correct option given in the bracket.

Due to incomplete linkage in maize, the ratio of parental and recombinants are _____.(7:1:1:7/1:2:7:1)

MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
Drosophila has four pairs of chromosomes. How many linkage groups does it have
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
Linkage groups can be separated during __________ in meiosis.
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
In maize chromosome number is 2n = 20. The number of linkage groups in it shall be
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
What will be the number of linkage groups in maize if it has 10 pairs of chromosomes?
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Linkage and Crossing Over
The split-gene arrangement further complicates the definition of a gene in terms of a _____.