Question

1.A homozygous red-eyed female Drosophilamates with a red-eyed male Drosophila. What proportion of thefemale offspring will have white eyes?

75%

25%

100%

0%

2.Red-green colorblindness is a recessive X-linked trait.If a female is red-green colorblind, which of the following isTRUE?

Her father mustbe colorblind.

Both herparents are carriers of the recessive allele.

Both herparents must be colorblind.

Her mother mustbe colorblind.

Women cannotexhibit red-green colorblindness because they have two Xchromosomes.

3.Allelesare

recessive traits.

dominant traits.

exact copies of the same trait.

alternate versions of the same trait

4.Using three bases torepresent each amino acid in a polypeptide

ensures that other organisms can read the codetoo.

prevents the wrong amino acid from being incorporated into aprotein.

ensures that DNA can replicate properly.

ensures that all amino acids are represented at least once bythe code.

5. If an organism's DNA contains 20%adenine nucleotides, what percentage of its DNA is composed ofguanine nucleotides?

15%

10%

30%

40%

6. Atrue-breeding tall pea plant is crossed with a tall pea plant ofunknown parentage. Which of the following iscorrect?

Some shortindividuals may appear in the F2 generation.

Some of the F1generation will be short.

All of theoffspring (F1) will be short.

Over severalgenerations, no short individuals will appear.

7.Morgan breeds and sells snakes. He knows that he can makethe most money by breeding and selling albino snakes. Albinism is arecessive trait. His female albino corn snake just produced 6offspring. Two displayed normal coloration and 4 were albino. Whatdo you know about the genotype of the father?

He could beeither heterozygous or homozygous dominant.

He must behomozygous recessive.

There is notenough information to determine the father's genotype.

He must beheterozygous.

8.During the elongation cycle of translation, the A site ona ribosome functions in

releasing thecompleted polypeptide.

holding apolypeptide as amino acids are added.

attaching thesmall subunits of rRNA to the large subunit.

receiving a newtRNA with the correct amino acid.

9.Whichof the following is an incorrect match?

translation -polypeptide formation

transcription -tRNA formation

translation -mRNA binding to rRNA

replication -copying of DNA

10. Thethree steps that are required for DNA replicationare

base doubling,unwinding, and joining.

unwinding, basedoubling, and base pairing.

unwinding,complementary base pairing, and joining.

unwinding,transcription, and translation.

11.Thex-ray diffraction pattern of DNA discovered by Rosalind Franklinshowed that DNA

contains alphahelices and beta sheets.

contains betasheets arranged in a repeated pattern.

has a repeatedpattern.

is both helicaland has a repeated pattern.

12.Which of the following is TRUE?

All traits onthe sex chromosomes are associated with sexual development.

Females can beheterozygous for sex-linked traits.

Males areheterozygous for the SRY gene.

Men pass theirX-linked traits to their sons.

13.Martha has a widow's peak and attached earlobes. Martha's dad had astraight hairline and unattached earlobes. What is Martha'sgenotype?

Wwee

WwEE

wwee

WWEE

Answer withBRIEF EXPLANATIONS please

if more than 2answers you given are wrong, low star, pretty much no pts!