Eyeless is a recessive gene on chromosome 4 of drosophila melanogaster. flies homozygous for ey have tiny eyes or no eyes at all. a male fly trisomic for chromosome 4 with genotype +/+/ey is crossed with a normal, diploid eyeless female.

what proportion of their progeny will be eyeless?

a. 1/6

b. 1/3

c. 1/2

d. 2/3

e. 1/8

f. 1/4

g. 3/8

h. 5/8

i. 3/4

Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above

Can you identify which of the following groups of organisms are, or are not, populations? a. the american bison (bison bison) and grey wolves (canis lupus) currently living in yellowstone national parkb. all of the rainbow trout (oncorhynchus mykiss that) that have ever lived in lake eriec. the group of american bison (bison bison) currently living in yellowstone national parkd. a group of calliope hummingbirds (selasphorus calliope) and a group of rufous hummingbirds (selasphorus rufus) living in the same new hampshire woodse. the northern cardinals (cardinalis cardinalis) living on opposite shores of lake champlain f. all of the whales currently living in the atlantic ocean off cape cod, massachusetts

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?