In: Biology
You are examining a system in which there is MATERNAL IMPRINTING. Which of the crosses below would result in a 1:1 ratio of wild-type to mutant?
A.) female aa X male AA
B.) female Aa x male AA
C.) female Aa x male Aa
D.) female AA x male aa
Answer.
C.) female Aa x male Aa
Explanation.
Maternal imprinting means that the allele of a particular gene inherited from the mother is transcriptionally silent and the paternally- inherited allele is active. Paternal imprinting is the opposite; the paternally-inherited allele is silenced and the maternally-inherited allele is active.Oct