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Build a Punnett square to represent each junction. Indicate gamete proportions, progeny proportions (each table) and...

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Biology

Build a Punnett square to represent each junction. Indicategamete proportions, progeny proportions (each table) and summarizephenotypes.

a. BBMM X BrMm

b. BrMm X BrMm

c. BrMm X rrmm

Answer & Explanation Solved by verified expert
3.6 Ratings (502 Votes)

BM BM BM BM
BM BBMM BBMM BBMM BBMM
Bb BBMb BBMb BBMb BBMb
rM BrMM BrMM BrMM BrMM
rb BrMb BrMb BrMb BrMb

This punnet square represents BBMM x BrMm

4 genotype present BrMm

4 phenotype BrMM

The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype

b))BrMm x BrMm

BM Bm rM rm
BM BBMM BBmM rBMM rBmM
Bm BBMm BBmm rBMm rBmm
rM BrMM BrmM rrMM rrmM
rm BrMm Brmm rrMm rrmm

2 trait cross
16 squares
9 unique allele combinations

  Genotype     Count     Percent  
rBmM 4 25
BBmM 2 12.5
rBMM 2 12.5
rBmm 2 12.5
rrmM 2 12.5
BBMM 1 6.3
BBmm 1 6.3
rrMM 1 6.3
rrmm 1 6.3

C))BrMm x rrmm

BM Bm rM rm
rm BrMm Brmm rrMm rrmm
rm BrMm Brmm rrMm rrmm
rm BrMm Brmm rrMm rrmm
rm BrMm Brmm rrMm rrmm

4 unique allele combination

4 nos BrMm, 4 Brmm,4 rrMm,4 rrmm are the genotypes
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