4. Continuing the example above of mating two plants, a homozygous recessive for pollen gran and...

4. Continuing the example above of mating two plants, a homozygous recessive for pollen gran and flower color and the other heterozygous for both traits. A) What are the genotype and phenotype ratios you expect for the offspring? B) Which Mendelian assumption are you making when estimating those allele ratios?

Solutions

Expert Solution

Genotypes: [let P represents pollen grain gene and F represents that for flower]

Homozygous plant genotype: ppff , Gametes can be pf and pf
Heterozygous plant genotype: PpFf, Gametes can be Pf, PF, pF and pf
Crossing can be shown as the figure above.

A) What are the genotype and phenotype ratios you expect for the offspring?

Ratio of genotype can be given as PpFf : Ppff : ppFf : ppff :: 1:1:1:1
Ratio of genotype can be given as:

Dominant flower trait with dominant pollen grain trait: dominant flower trait with recessive pollen trait: recessive flower trait with dominant pllen trait: recessive flower trait with recessive pollen trait :: 1:1:1:1

B) Which Mendelian assumption are you making when estimating those allele ratios?

Mendel's law of independent assortment: explains the assorting of individual traits without respect to others in formation of gametes and then offsprings and thus accounts for those allele ratios.

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gladiator answered 11 months ago

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