<> 2 questions in one ........ having do to with with Mendel?

Question

Mendel crossed two pure breeding pea flowers, one with white flowers and one with purple flowers.

<A> What was the genotype of the white flower?

a) PP

b) Pp

c) pp

d) none

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<B>

Mendel then crossed two of the purple offspring. What is the ratio of Phenotypes?

a) 3 purple: 1 white

b) 2PP:1Pp:1pp

c) 1 purple:3 white

d) 1PP:2Pp:1pp

i think its a

Answer 1

&lt;A&gt;

In the first question I assume P = purple, p = white and that purple is fully dominant to white. I assume this because it is usual to use the first letter of the dominant allele as the capital the the recessive gets the lower case.

PP x pp =&gt; Pp

The white parent, IF white is recessive to purple, is pp

&lt;B&gt;

For this part you are correct if Mendal was crossing the heterozygous first generation of the previous cross

PP x pp =&gt; Pp

He would be crossing Pp x Pp a monohybrid cross.

Monohybrids give

3:1 genotype ratios Purple (PP or Pp) : white (pp)