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posted by gene passion on 9/27/2008 5:46:55 PM | status: Live

Genetices

Course	Textbook	Chapter	Problem
Genetics	N/A	N/A	N/A

Question Details:

Q:- In poultry, the genes for rose comb (R) and pea comb (P) together produce walnut comb. The alternative alleles of both in a homozygous condition (i.e. rrpp) produce a single comb. From the information concerning interactions of these genes given in the chapter, Determine the phenotypes and properties expected from the following crosses:

A) RRPp * rrPp

B) rrPP * RrPp

C) RrPp * Rrpp

D) Rrpp * rrpp

Tags: Biology, Genetics

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Answers:

licy

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posted by licy on 10/3/2008 5:25:50 AM | status: Live

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Response Details:

a.) RRPp x rrPp

RP , Rp rP , rP ___Gametes

gametes	rP	rp
RP	RrPP walnut	RrPp walnut
Rp	RrPp walnut	Rrpp rose

b.) rrPP x RrPp

rP , rP RP, rp

Gametes	RP	rp
rp	RrPp walnut	rrpp single
rp	RrPp walnut	rrpp single

c.) RrPp x Rrpp

RP, rp RP, Rp, rP, rp

Gametes

RRPp

walnut

RRpp

rose

RrPp

walnut

Rrpp

rose

RrPP

walnut

RrPp

walnut

rrPP

pea

rrPp

pea

d.) Rrpp x rrpp

Rp , rp rp gametes

gametes	rp	rp
Rp	Rrpp rose	Rrpp rose
rp	rrpp single	rrpp single

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