Elenore194
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In pigs, the allele for a wavy, rough coat (R) is dominant to the allele for a soft, fine coat (r). A rough coat boar and a soft coat sow mate. They produce several litters, 50% are rough coat and 50% are smooth coat. What were the genotypes of the parents?

Sagot :

Porshia
1. Do a pun-net square.
R r
r
r
2. The offspring would be Rr, rr, Rr, rr
3. 2 of them are heterozygous(Rr),which means they would be most likely rough coats
4. Two of them are homozygous for short hair (rr) which means they are going to be soft hair.
5. Your answer is
Rr, rr

Answer:

Genotype of  rough coat boar - Rr

Genotype of soft coat sow mate - rr

Explanation:

Rough coat boar must be heterozygous with one dominant allele (R ) and one recessive allele (r )

Genotype of rough coat boar - Rr

Genotype of soft coat sow mate – rr

Now if these two parents are crossed , the offspring produced are represented in the punnet square below –  

R r

r Rr rr

r Rr rr

Thus, 50 % of the offspring’s have rough coat (Rr) and 50 % of the offspring’s have smooth coat.  

 

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