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Q1. Suppose you are starting a series of pea crossing experiments to illustrate the Mendelian inheritance...

Q1. Suppose you are starting a series of pea crossing experiments to illustrate the Mendelian inheritance principles. You start with two true breeding parents: one parent plant produces purple flowers and round seeds, while the other parent produces white flowers and wrinkled seeds.

Using the convention of naming genes and alleles we covered in this course, identify the genotypes of parent 1 and parent 2. (2 pts)

You performed a cross between the two parent plants in (A) to generate F1 progenies. Predict what genotype(s) and phenotype(s) you expect to see in these. If you predict more than one genotype and/or phenotype, list how many of each type you expect. (2 pts)

Suppose you took one of the F1 progenies and made a cross with P2 plant. Using a Punnett square, show how you will predict the genotypes from this cross. (4 pts)

For each genotype you identified in (C), list the corresponding phenotype. (2 pts)

Expert Solution

A)

parent 1(p1) is a true breed with purple flower and round seed.

Genotype will be PPRR (P allele code for purple flower and R allele code for round seed)

parent 2 (p2) is a true breed with white flower and wrinked seed

Genotype will be pprr( p is the recessive allele code for white flower and r is the recessive allele coding for wrinkled seed)

b) F1 generation is obtained by crossing p1 ×p2

PPRR Cross pprr

Gametes of p1 plant will be PR

Gamete of the p2 plant will be pr

So the genotype of the F1 progeny will be PpRr.

phenotype of the F1 progeny wil be purple flower and round seed.

c) cross between F1progeny with p2 parent.

PpRr (F1 progeny). × pprr (p2 parent)

Gametes of the F1 progeny will be PR,Pr,pR,pr.

Gametes of the p2 parent will be pr.

punnet square

	pr	pr	pr	pr
PR	PpRr	PpRr	PpRr	PpRr
Pr	Pprr	Pprr	Pprr	Pprr
pR	ppRr	ppRr	ppRr	ppRr
pr	pprr	pprr	pprr	pprr

d)Phenotypes will be

PpRr - purple flower and round seed

Pprr- purple flower and wrinkled seed

ppRr- white flower and round seed

pprr- white flower and Wrinkled seed

gladiator answered 2 years ago

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