(c) Genetic drift is the mechanism of volution / recombination / replication/ translation.
(d) When two genes have the
same
expression of the character, then the phenomenon is known as Pleiotropy/Penetrance / Expressivity / Epistasis. (e) Linkage decreases as the distance
between two
genes
decreases /
increases/ unaffected / None of these.
2. Write short notes on any three of the following:
4×3-12
(a) Codominance
(b) Inversion
(c) Mutagens
(d) Cytological basis of crossing-over
(e) Translocation ring
3. What do you mean by epistasis? How does it differ from dominance? Describe it with suitable example.
2+2+8-12
Or
Write short notes on the following: 6+6-12 (a) Chromosome theory of inheritance (b) Role of transposons in mutation
4. Write the difference between the following 3-4-12
laj Euchromatin and Heterochromatin
(b) Sex-limited and Sex-influenced traits (c) Penetrance and Expressivity
(d) Multiple alleles and peligen
What is linkage? Differentiate between
complete and incomplete linkage. Describe
briefly the significance of linkage.
2+8+2-12
5. What do you mean by speciation? Describe the different types of speciation. What is the significance of speciation? 2+8+2-12
Or
What is cytoplasmic inheritance? How is cytoplasmic inheritance different from chromosomal inheritance? Give an account of cytoplasmic inheritance with special
reference to plastid inheritance. 1+3+8-12
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