Assume B dominant, = brunette; b recessive, blondGeorge and Elizabeth had a blond baby. Both the mother and father of blond-hairedGeorge are brunettes. Elizabeth is a brunette and has a blond father and brunettemother. Question: What are the genotypes (BB or Bb or bb) of eachperson?Father (Brunette) BBGeorge (Blond)bbGEORGE'SSIDEMother (Brunette)BbGeorge and Elizabeth's child (Blond)bbFather (Blond)bbELIZABETH'SElizabeth (Brunette)bSIDEВеMother (Brunette) BB

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Asked Nov 15, 2019
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Assume B dominant, = brunette; b recessive, blond
George and Elizabeth had a blond baby. Both the mother and father of blond-haired
George are brunettes. Elizabeth is a brunette and has a blond father and brunette
mother. Question: What are the genotypes (BB or Bb or bb) of each
person?
Father (Brunette) BB
George (Blond)bb
GEORGE'S
SIDE
Mother (Brunette)Bb
George and Elizabeth's child (Blond)bb
Father (Blond)bb
ELIZABETH'S
Elizabeth (Brunette)b
SIDE
Ве
Mother (Brunette) BB
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Assume B dominant, = brunette; b recessive, blond George and Elizabeth had a blond baby. Both the mother and father of blond-haired George are brunettes. Elizabeth is a brunette and has a blond father and brunette mother. Question: What are the genotypes (BB or Bb or bb) of each person? Father (Brunette) BB George (Blond)bb GEORGE'S SIDE Mother (Brunette)Bb George and Elizabeth's child (Blond)bb Father (Blond)bb ELIZABETH'S Elizabeth (Brunette)b SIDE Ве Mother (Brunette) BB

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Step 1

The branch of biology that deals with the study of genes, heredity and genetic variations are termed as genetics. Every gene contains two alleles for a trait, a dominant allele, and a recessive allele. A dominant allele will be expressed in a person even if only it's one copy is present in the gene, while a recessive allele will be expressed in a person if its two copies are present in the gene for the given trait.

Step 2

Given:

Allele for brunette hair = B (dominant)

Allele for blonde hair = b (recessive)

Genotype for brunette haired person = Bb or BB

Genotype for blonde haired person = bb

The baby of George and Elizabeth is blonde. Hence, the genotype of the baby is bb.

George is blonde haired. Hence, the genotype of George is bb.

The parents of George are brunette. Hence, their genotype can be in the following combinations:

Mother = BB, Father = BB

Mother = BB, Father = Bb

Mother = Bb, Father = BB

Mother = Bb, Father = Bb

From the above genotypes of George’s parents, it is seen that,...

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