When two different genes came from same parent they tend to remain together.
i) What is the name of this phenomenon?
ii) Draw the cross with suitable example.
iii) Write the observed phenotypic ratio.

If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F₁ hybrid. Now you cross F₁ male with double recessive female.
i) What type of linkage is seen?
ii) Draw the cross with correct genotype.
iii) What is the possible genotype in F₂ generation?

s.no	gamete types	Number of progenies
1	ABC	349
2	Abc	114
3	abC	124
4	AbC	5
5	aBc	4
6	aBC	116
7	ABc	128
8	abc	360

i) What is the name of this test cross?
ii) How will you construct gene mapping from the above given data?
iii) Find out the correct order of genes.

What is the difference between missense and nonsense mutation?

Define linkage. Mention its types.

What does the condition synteny refers to?

Define terminalization.

What are multiple alleles?

Why do we call papaya a dimorphic plant.

Define the term mutation. Who coined the term?

What does indel mutation refers to?

Define mutagens and mention its types.

Name any four chemical mutagens.

Nitrous oxide is a potent mutagen - comment.

What are deficiency loops?