explain how a 2:1 phenotypic ratio for a given locus with two alleles (3 possible genotypes) is produced for one trait, yet the same locus simultaneously reflects another trait (lethality)with a phenotypic ratio of 1dead:3alive.
2007-01-18 00:26:32 · 2 answers · asked by bashir_khan88 1 in Science & Mathematics ➔ Biology
The homozygous dominant allele is lethal.
The heterozygous individual expresses the dominant phenotype, but does not die.
The recessive individual expresses the recessive phenotype, and does not die.
2007-01-18 00:55:53 · answer #1 · answered by floundering penguins 5 · 1⤊ 0⤋
well first we need to know what traits are controlled by said alleles, and which allele is dominant. PS. phenotype are expressed traits(like blue eyes vs. brown) not survival chance of the offspring.
2007-01-18 08:37:44 · answer #2 · answered by TechChick 3 · 0⤊ 0⤋