1.If we cross pure-bred tall (dominant) pea plant with pure-bred dwarf (recessive) pea plant we will get pea plants of F 1 generation. If we now self-cross the pea plant of F 2 generation, then we obtain pea plants of F 2 generation. (a) What do the plants of F 2 generation look like? (b) State the ratio of tall plants to dwarf plants in F 2 generation. (c) State the type of plants not found in F 2 generation but appeared in F 2 generation, mentioning the reason for the same.
Answers
Principles of Inheritance and Variation
Mendel's Experiments and Laws of Inheritance
If we cross pure - bred tal...
BIOLOGY
If we cross pure-bred tall (dominant) pea plant with pure-bred dwarf (recessive) pea plant we will get pea plant of F
1
generation, then we obtain pea plants of F
2
generation.
(a) What do the plants of F
1
generation look like?
(b) State the ratio of tall plants to dwarf plants in F
2
generation.
(c) State the type of plants not found in F
1
generation but appeared in F
2
generation, mentioning the reason for the same.
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ANSWER
(a) F
1
plants: All tall (the dominant trait)
(b) F
2
generation= 3 tall : 1 dwarf
(c) F
1
plants do not exhibit dwarfism as presence of dominant allele (T) in monohybrid (Tt) mask the expression of rececssive allele (t). Two factors for a trait (alleles for tallness and dwarfism), present together in a heterozygous individual (Tt), do not get mixed and are separated during gametogenesis and exhibited in F
2
generation.
solution