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  3. 2. a trihybrid individual heterozygous for three c

2. A trihybrid individual heterozygous for three corn seed traits is testcrossed.        Parents: CCssWW (CsW/CsW)       X       ccSSww (cSw/cSw)        Trihybrid: CcSsWs (CsW/cSw)         X       ccssww (csw/csw) Test cross offspring Seed trait Gamete from trihybrid Number Red,...

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Biology

2. A trihybridindividual heterozygous for three corn seed traits istestcrossed.

       Parents: CCssWW(CsW/CsW)       X       ccSSww(cSw/cSw)

       Trihybrid: CcSsWs(CsW/cSw)         X       ccssww(csw/csw)

Test crossoffspring

Seed trait

Gamete fromtrihybrid

Number

Red, shrunken,normal

CsW

2777

White, plump, waxy

cSw

2708

Red, plump, waxy

CSw

116

White, shrunken,normal

csW

123

Red, shrunken,waxy

Csw

643

White, plump,normal

cSW

626

Red, plump, normal

CSW

4

White, shrunken,waxy

csw

3

Total number ofprogeny:

7000

a) Identify parental,SCO (single crossover) and DCO (double crossover) classes

b) Determine the geneorder

c) Calculate the mapdistance for each gene interval

Answer & Explanation Solved by verified expert
3.7 Ratings (358 Votes)
Analyses Given corn has three loci under observation ie C stands for seed colour Red dominant and white recessive S stands for seed shape Plump dominant and shrunken recessive and W stands for seed coating Normal dominant and waxy recessive controlling loci Given trihybrid cross is CsWcSw X cswcsw parental combination will be CsW and cSw the respective offspring no is 2777 and 2708 while some recombinant offspring will also be produced due to the cross over CO    See Answer
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