the numbers are already given. Just help answer the whole question. a-d Hagrid,
ID: 192928 • Letter: T
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the numbers are already given. Just help answer the whole question. a-d
Hagrid, the gamekeeper at Hog magical creatures since Harry Potter broughh wis are very This obtained a true-breeding browshowy white owls for Hogwarts students. He brown and pearl owis, he obtained altre breeding Pearl owl. When he mated thhe rown owls. However, when he mated the F ng offspring brown owls, he obtained the fol Snowy Whie Owls 58 Posar Ols16o Brown Owis Total a. What are the genotypes of the original o wls (parents)? (2 points) An, A b. What are the genotypes of the FI owls? ( 2 points) What are the genotypes AND CORRESPON c. points). You may show your answer above, DING PHENOTYP ES of the F2 owls?C 6. d. What type of inheritance is illustrated in this cross? (2 points)Explanation / Answer
Here the ratio of the progeny of F2 generation is nearly 9:6:1 which is the case of polymeric gene interaction in which Two dominant alleles have a similar effect when they are separate but produce an enhanced effect when they come together. The joint effect of two alleles appears to be additive or cumulative, but each of the two genes shows complete dominance, hence they cannot be considered as additive genes. In case of additive effect, genes show lack of dominance.
considering if when two dominant genes are B and P are together they produce brown color when they are separate they produce white color and its recessive part will produce pearl color in own.
which means, individual with BBPP, BBPp, BbPp andBbPP will produce a brown color, BBpp, Bbpp, bbPP, and bbPp will produce white color and bbpp will produce pearl color
a) therefore, the genotype of Parent owl will be
brown color owl = BBPP and Perl color owl = bbpp
b) genotype of F1 owl will be = BbPp
c) Genotype and phenotype of F2 generation owl will be
for brown color phenotype, genotype will be BBPP, BBPp, BbPp, and BbPP
for white color phenotype, genotype will be BBpp,Bbpp, bbPP and bbPp
for perl colour phenotype , genotype will be bbpp
d) As i said earlier its a polymeric gene interaction.
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