12.1: Morgan showed that Mendelian inheritance has its physical basis in the behavior of chromosomes: Scientific inquiry

Question 1

What did Morgan find out?

Answer 1

Morgan found out that genes had to do with chromosomes

Question 2

Drosophila Melanogaster

Answer 2

a common insect that feeds on fungi growing on fruit, was convenient for breeding and was studied by Morgan, a common insect that feeds on fungi growing on fruit, was convenient for breeding and was studied by Morgan

Question 3

wild type

Answer 3

the most common phenotype observed in a natural population, red eyes for the fly

Question 4

mutant phenotypes

Answer 4

the alternative to wild types, not common

Question 5

superscript +

Answer 5

the allele of the wild types

Question 6

When the white and red-eyed flies were mated, F1? F2? observation?

Answer 6

F1 offspring were all red (dominant/wild type)

however, the F2 generation had the classic 3:1 ratio

For a male, a single copy of the mutant allele confers white eyes, this is because the Y chromo does not do anything, the females got only red eyes because they get only w^+ alleles on the X