Answer to Question #66767 in Genetics for Mya
Nepenthes distillatoria (the carnivorous pitcher plant) as
a model plant makes the following cross. She proceeds to take a wild type pure-breeding
female pitcher plant trisomic for chromosome 2 and crosses it to a normal diploid male pitcher
plant that is homozygous for a recessive mutation (v) that makes it hungry all the time (the
super hungry mutant). A trisomic F1 plant is then back-crossed to the super-hungry male
parent. From this cross:
A] What is the ratio of normal pitcher plants to those that are super hungry when you assume
that v is located on chromosome 2?
B] What is the ratio of normal pitcher plants to those that are super hungry when you assume
that v is not located on chromosome 2?
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