10 Jun Monohybrid genetic cross to determine dominant trait
Question
Monohybrid genetic cross to determine dominant trait
This is the genetic problem that I need to understand how to complete.
Sand lizards in white sands new mexico:
If for each species a lizard that was homozygous for the dark Mc1r allele had been crossed with a lizard that was homozygous for the light Mc1r allele the resulting F1 generation would have obtained the percentage of light skinned offspring shown below in coloum 2. If they had gone on to cross 2 offspring from the F1 generation, the resulting F2 generation would have obtained the results shown in column 3 below.
for each of the 2 species state whether the light allele is dominant or recessive to the dark Mc1r allele. Draw mating diagrams to support your answer.It needs to show the crosses and the genotype and phenotype ratios that result in the F1 anf F2 generations.
Lizard species % of light skinned lizards % of lizards in F2
in F1 generation generation
Sceloporus undulatus 100% 75%
Aspidoscelis inornata 0% 25%
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