Question 1
Species A has 2n=16 chromosomes and species B has 2n=14 chromosomes. Offspring that are diploid for either 22 or 23 chromosomes are most likely?
◦ autotriploids of species A
◦ autotetraploids of species B
◦ allotriploids
◦ allotetraploids
◦ allohexaploids
Question 2
The flies with variegated eye color had what abnormal chromosome structure?
◦ X-chromosome inversion that moves the
w+ gene to a different orientation on the chromosome in some cells following X-ray exposure
◦ X-chromosome translocation that moves the
w+ gene to a region of heterochromatin on another chromosome in some cells following X-ray exposure
◦ a mutation in the
w+ gene following X-ray exposure that causes the gene to be overexpressed in a tissue-specific manner
◦ X-chromosome deletion that deleted the
w+ gene in some cells following X-ray exposure
◦ a mutation in a somatic chromosome that causes the
w+ gene to be translocated to the X-chromosomes following X-ray exposure
Types of changes in chromosome structure
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X-linked eye-color phenotypes in Drosophila melanogaster