Web Analytics
halexiaanRi
Answered

The second generation phenotypes resulting from the cross of true-breeding monohybrid pollination will display a ratio of _____.




4:1

1:2:1

3:1

none of the above

Verified Answer :

JcAlmighty

The answer is 3:1.

A - the dominant allele
a - the recessive allele

The parental generation (P) is AA and aa:
P               AA      x      aa
F1           Aa    Aa    Aa    Aa

F1 is the first generation of offspring. After their cross, we get the second generation of offspring:
F1            Aa        x         Aa
F2       AA       Aa     Aa     aa

So we have 3 dominant phenotypes (AA, Aa, and Aa) and 1 recessive phenotype (aa). The ratio is 3:1

adrianevaeh62403

It is 3:1 ..........

Related Questions