Question

1. pea plant flower color is genetically controlled. purple flower color is dominant to white flowers. what would the phenotypic and genotypic ratios be if you crossed a homozygous purple flowered male with a homozygous white flowered female? parental phenotypes: ♀ ________________ ♂ ______________ parental genotypes: ♀ ______________ ♂ ______________ possible gametes (eggs and sperm) ♀ __ and __; ♂ __ and __. fill out the punnett square. ♂ gametes __ __ ♀ gametes __ ____ online cross 7.

Explanation:

Step1: Determine parental phenotypes

The female is homozygous white - flowered, so her phenotype is white flowers. The male is homozygous purple - flowered, so his phenotype is purple flowers.
Female phenotype: White flowers; Male phenotype: Purple flowers

Step2: Determine parental genotypes

Let the allele for purple flowers be \(P\) (dominant) and the allele for white flowers be \(p\) (recessive). A homozygous purple - flowered male has the genotype \(PP\), and a homozygous white - flowered female has the genotype \(pp\).
Female genotype: \(pp\); Male genotype: \(PP\)

Step3: Determine possible gametes

The female (\(pp\)) can only produce gametes with the allele \(p\). The male (\(PP\)) can only produce gametes with the allele \(P\).
Female gametes: \(p\) and \(p\); Male gametes: \(P\) and \(P\)

Step4: Fill out the Punnett - square

	\(P\)	\(P\)
\(p\)	\(Pp\)	\(Pp\)

Step5: Determine phenotypic and genotypic ratios

All of the offspring have the genotype \(Pp\) (heterozygous), so the genotypic ratio is \(Pp:Pp:Pp:Pp = 4:0:0\) (or simply all \(Pp\)). Since the purple allele (\(P\)) is dominant, all of the offspring have the purple - flowered phenotype. So the phenotypic ratio is Purple:White = 4:0.

Answer:

Parental Phenotypes: Female - White flowers; Male - Purple flowers
Parental Genotypes: Female - \(pp\); Male - \(PP\)
Possible Gametes (eggs and sperm): Female - \(p\) and \(p\); Male - \(P\) and \(P\)
Punnett - square:

	\(P\)	\(P\)
\(p\)	\(Pp\)	\(Pp\)

Genotypic ratio: All \(Pp\)
Phenotypic ratio: Purple:White = 4:0