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BIO 2133 Genetics Lab Report 3 Inheritance Pattern in Epistatic, Lethal and Sex-linked Mutations
The mutation of interest for part 1 of the lab (lethal mutations) are ST and SB. ST stands for star eyes mutant phenotype (character: eye shape) while SB stands for stubble bristles mutant phenotype (character: bristle). Question: What is the pattern of inheritance in a dihybrid cross for which the female is heterozygous mutant for an autosomal lethal allele (ST+) and the male is homozygous wild type (++). Hypothesis: A cross between two parent that have different alleles (one that expresses the dominant trait and one that expresses the recessive trait) at one gene will produce offspring following Mendel’s first law. However, the homozygous mutant progeny will not survive and so phenotypic ratio will be rescaled among the surviving progeny.
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