Question

Choose two parents. remember that blue-winged butterflies have the genotype bb , re d-winged butterflies have the genotype bb, and the genotype bb produces purple-winged butterflies. what are the genotypes and phenotypes of the parents? what are the genotypes and phenotypes of the offspring?

Answer 1

Genotype refers to the set of genes in our DNA which is responsible for a particular trait, while the physical expression or characteristic of that trait is known as the phenotype.

For this case, to know the genotype and phenotype of the offsprings and the parents, we will use Punnett Square. 

If both parents have Bluewings (BB), all their offsprings will also have bluewings (BB).

Likewise, if one of the parents have purple wings (bb) while the other has blue wings (BB) all their offsprings will have red wings (Bb).

If one of the parents have bluewings (BB) while the other has red wings (Bb), 50% of the offsprings will have blue wings (BB), while the other 50% will have red wings (Bb).

If one of the parents has red wings (Bb) while the other one has purple wings (bb), 50% of their offspring will have red wings (Bb), while the other will have purple wings (bb).

Lastly, if both parents both have purple wings (bb), all their offsprings will have purple wings.

Answer 2

Answer:

Genotype of Parents - Bb

Phenotype of parents - Purple Winged parents

Genotypes and Phenotypes of Offsprings

BB- Blue winged butterfly offspring

bb - red winged butterfly offspring

Bb - Purple winged butterfly offsprings

Explanation:

Here , three type of offsprings are produce

a) Butterflies having blue wings

b) Butterflies having red wings

c) Butterflies having purple wings

Let us assume the Blue wing allele is represented by "B", Red wing allele is represented by "b" .

Here, purple winged butterflies are produced which means that both the alleles of blue and red wings are codominant , which means that they both expresses their trait.

Now, we will work out the genotype of offsprings first

a) Butterflies having blue wings - BB

b) Butterflies having red wings - bb

c) Butterflies having purple wings - Bb

On the basis of genotype of offsrpings the genotype of parents would be

Bb

Which means both the parents would be heterozygous with purple coloured wing

Cross check -

when two purple winged heterozygous butterflies are crossed, the following offsprings are produced

             B                   b

B           BB                 Bb

b           Bb                 bb

BB- Blue winged butterfly offspring

bb - red winged butterfly offspring

Bb - Purple winged butterfly offsprings