Brown seed pods (B) in the plant species is dominated to green (b), and elongate

Question

Brown seed pods (B) in the plant species is dominated to green (b), and elongated pods (E) is dominated over sqiushed (e). A) a fully heterozygous plant has the dominant alleles linked in trans ( i.e dominant alleles not on the same homologue) at a map distance of 20cM. what will be the genotype of gametes produced by this plant and in what frequencies (or percentages)? b) if the plant is self pollinated, what progeny phenotypes will you expert to see, and in what frequencies? you may use a punnet square to illustrate your answer. Brown seed pods (B) in the plant species is dominated to green (b), and elongated pods (E) is dominated over sqiushed (e). A) a fully heterozygous plant has the dominant alleles linked in trans ( i.e dominant alleles not on the same homologue) at a map distance of 20cM. what will be the genotype of gametes produced by this plant and in what frequencies (or percentages)? b) if the plant is self pollinated, what progeny phenotypes will you expert to see, and in what frequencies? you may use a punnet square to illustrate your answer. Brown seed pods (B) in the plant species is dominated to green (b), and elongated pods (E) is dominated over sqiushed (e). A) a fully heterozygous plant has the dominant alleles linked in trans ( i.e dominant alleles not on the same homologue) at a map distance of 20cM. what will be the genotype of gametes produced by this plant and in what frequencies (or percentages)? b) if the plant is self pollinated, what progeny phenotypes will you expert to see, and in what frequencies? you may use a punnet square to illustrate your answer.

Explanation / Answer

Part A:

Allele Bb and Ee are in trans position

B--------------------e

b---------------------E

The dominant alleles i.e; BE are at map distance of 20cM.

The genotype of gametes would be Be, bE of parental genotype and be, BE are recombinants.

The recombination rate between B and E is 20%. Therefore the recombinant gametes will have frequency of 10% each whereas parental gametes will have 40% each.

Be: 40% or 0.4

bE: 40% or 0.4

be : 10% or 0.1

BE :10% or 0.1

Part B:

P1 (self pollination) Be bE be BE x Be bE be BE

The phenotype would be Be: Brown seeded with squished pods, bE: green seed with elongated pods, be: green seeded with squished pods, BE: Brown seeded with elongated pods.

Be (0.4) bE (0.4) be (0.1) BE (0.1) Be (0.4) BBee (0.16) BbEe (0.16) Bbee (0.04) BBEe (0.04) bE (0.4) BbEe (0.16) bbEE (0.16) bbEe (0.04) BbEE (0.04) be (0.1) Bbee (0.04 bbEe (0.04) bbee (0.01) BbEe (0.01) BE (0.1) BBEe (0.04) BbEE (0.04) BbEe(0.01) BBEE (0.01)

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