One tall pea plant and one dwarf pea plant on crossing resulted in 50% tall and 50% dwarf pea plant. The plants which were crossed were
(a)Tt x Tt (b)TT x tt
(c)Tt x tt (d) None of the above
please answer quickly
Answers
Answer:
A cross between pure breeding tall (TT) and dwarf (tt) plants produce all tall (Tt) plants in F
1
progeny. These heterozygous tall plants produce 50% gametes with "T" allele and 50% with "t" allele. Random fusion of these gametes from two heterozygous tall plants gives tall and dwarf plants in 3:1 ratio. out of 3/4 tall plants; 1/4 are homozygous tall (TT) and 2/4 are heterozygous tall (Tt). This makes the genotypic ratio for F
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generation as 1 homozygous tall (TT): 2 heterozygous tall (Tt): 1 homozygous dwarf (tt). This makes option B incorrect and option A correct. Option D is incorrect as 3/4 plants are tall while 1/4 are the dwarf in F
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generation. Option C is incorrect as the question is asking the genotypic ratio. The correct answer is A.
Answer:
Option (c) Tt×tt gives 50%tall and 50% dwarf pea plants.
Explanation:
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