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A man who is an achondroplastic dwarf with normal vision marries a color-blind woman of normal height. The man's father was 6 feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-linked recessive.
-Given the following cross between parents of the genotypes AABBCc × AabbCc, assume simple dominance for each trait and independent assortment. What proportion of the progeny will be expected to phenotypically resemble the first parent?

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The first parent is an achondroplastic dwarf with normal vision. The genotype AABBCc indicates that the first parent is homozygous dominant for achondroplasia (AA), homozygous dominant for normal vision (BB), and heterozygous for height (Cc). The second parent is AabbCc, indicating heterozygous for achondroplasia (Aa), homozygous recessive for color blindness (bb), and heterozygous for height (Cc). The progeny must inherit at least one dominant allele for achondroplasia (A) and normal vision (B) to phenotypically resemble the first parent. The probability of inheriting these alleles is 3/4.

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