After self-pollination in pea plants with round, yellow seeds, following types of seeds were obtained by Mendel:
Seeds Number
Round yellow 630
Round green 216
Wrinkled yellow 202
Wrinkled green 64
Analyse the result and describe the mechanism of inheritance which explains these results.
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Given:
Round Yellow (RRYY) = 630
Round Green (RRyy) = 216
Wrinkled Yellow (rrYY) = 202
Wrinkled Green (rryy) = 64
now,
RRYY:RRyy:rrYY:rryy
= 630 : 216 : 202 : 64
= 9.8 : 3.4 : 3.2 : 1 (dividing each term by 64)
= approx. 9 : 3 : 3 : 1
Hence this the correct phenotypic ratio as obtained by Mendel in a Dihybrid Cross.
The "law of independent assortment" is followed in this type of a cross.
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