What is crossing over?

Very Short Answer

Crossing over is the exchange of genetic material between homologous chromosomes during meiosis, which leads to variation in offspring.

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Chapter 3 Inheritance and Variation
Exercises | Q 2.4 | Page 68

Name the ‘two’ types of maps generated by H.G.P.

Write a note on sex linkage.

Analyse the following statements with respect to complete sex linkage and select the correct option.

It is exhibited by genes located on non-homologous regions of X and Y chromosomes
Y-linked trait is hypertrichosis.
X-linked traits are haemophilia, red-green colour blindness, myopia (near sightedness).

Mr. Kapoor has Bb autosomal gene pair and d allele sex-linked. What shall be proportion of Bd in sperms?

To determine the genotype of a tall plant of F₂ generation, Mendel crossed this plant with a dwarf plant. This cross represents a ______.

Which of the following is a test cross?

What is true about the crossing over between linked genes?

When ‘Aa’ is crossed with ‘aa’, (A is dominant over a)

What is the pattern of inheritance in the above pedigree chart?

Linkage groups can be separated during ______ in meiosis.