Mendal First Crossed pure-Bred pea plants having Round-Yellow Seeds with pure-Bred pea plants having wrinkled-Green Seeds and found that only round - yellow seeds were produced in The F1 Generation. When F1 Generation pea plants having Round-Yellow Seeds were cross-bred By Self Pollination, then Peas having Round-Yellow seeds, round-green seeds, wrinkled-yellow seeds and Wrinkled-Green seeds were produced. Mendel Collected a Total Of 2160 Seeds.
(A) What will be the number of (i) Round Green seeds (ii) wrinkled-Green seeds (iii) Round Yellow Seeds, and (iv) wrinkled-yellow seeds ?
(B) What Ratio as Established By Mendal Have you made Use of in Answering the Part (A) Above ?
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Answers
Answer:
(1) Number of round green seeds =
216016×3=405
(2) Number of wrinkled green seeds =
216016×1=135
(3) Number of round yellow seeds =
216016×9=1215
(4) Number of wrinkled yellow seeds =
216016×3=405
b) The dihybrid ratio (which is 9: 3: 3: 1) has been used to answer part of a
Explanation:
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Answer:
In F
1
generation only the dominant traits are expressed. All of them are same genotypically and phenotypically because all are formed from the same kind of gametes.. But as the offsprings are crossbred the recessive characteristics start showing up in the phenotype to give new combinations. Many new genotypic and phenotypic combinations are made due to different kinds of gametes available
A punnets square can help in a better understanding of these new phenotypes. Hence we see yellow and round, yellow and wrinkled, green and round, green and wrinkled.
Explanation:
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