Question #1
What is meant by a "reading frame" ?

a substitution mutation
deletions of three of more bases
the place where the three bases begin the coding sequence
the order in which the bases are read by the ribosome
the order and polarity in which the bases are read by the ribosome

Question #2
Vestigial wings in the fruit fly, Drosophila melanogaster, are caused by a recessive gene, vg. In a cross between a female fly with vestigial wings and a heterozygous male fly with normal wings, the expected genotypic and phenotypic ratios (respectively) of the offspring are:

all Vgvg and all normal wings.
3 Vgvg: 1 vgvg and 3 normal: 1 vestigial.
1 Vgvg: 1 vgvg and 1 normal: 1 vestigial.
3 vgvg: 1 Vgvg and 3 vestigial: 1 normal.
The ratios cannot be determined from the data given.

Question #3
In crossing a homozygous recessive with a heterozygote, the chance of getting a recessive phenotype in the next generation is:

25 percent.
50 percent.
75 percent.
100 percent.
0 percent

Question #4
A couple has three children, all of whom have blond hair and brown eyes. Both parents have brown eyes (BB), but one is a blond (Rr) and the other is a redhead (rr). What is the probability that the next child will be a brown-eyed redhead?

1/16
1/8
1/4
1/2
1

Question #5
Pea flowers may be purple (W) or white (w). Pea seeds may be round (R) or wrinkled (r). What proportion of the progeny from the cross WwRr x WwRr will have white flowers and wrinkled seeds?

1/16
3/16
8/16
9/16
all of them

Question #6
Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What proportion of the progeny of the cross BbTt x Bbtt will have black fur and long tails?

1/16
3/16
6/16
8/16
9/16

Question #7
Self-pollination in a plant that is heterozygous for two independently assorting genes will produce ________ phenotypes among the progeny.

one
two
three
four
eight

Question #8
How many different kinds of gametes may be produced by an organism with the genotype rRYY?

one
two
three
four
five

Question #9
How many different kinds of gametes may be produced by an organism with the genotype RrYy?

one
two
three
four
five

Question #10
In peas, round seed shape (R) is dominant to wrinkled shape (r) and yellow seed color (Y) is dominant to green (y). If two plants of genotype RrYy are crossed, what proportion of the offspring would have round, yellow seeds?

3/4
9/16
3/16
1/4
1/16