The genotype and phenotype if one parent were heterozygous for widow’s peak and the other parent were homozygous for a straight hairline. Concept introduction: Genotype is the allelic identity of the organism based on which the phenotype is expressed. The Mendelian pattern of inheritance is based on dominant and recessive alleles. Dominant alleles are those that are expressed in both homozygous and heterozygous form. Recessive alleles are only expressed in homozygous form.

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Chapter 29.9, Problem 38WDL

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To explain: The genotype and phenotype if one parent were heterozygous for widow’s peak and the other parent were homozygous for a straight hairline.

Concept introduction: Genotype is the allelic identity of the organism based on which the phenotype is expressed. The Mendelian pattern of inheritance is based on dominant and recessive alleles. Dominant alleles are those that are expressed in both homozygous and heterozygous form. Recessive alleles are only expressed in homozygous form.

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