Evolution and Genetics Part 1

A strand of DNA has these three bases:

AGC CAT GTA TAC

What is the complementary DNA strand?

• ACG GAT CTA TAG

• TCG GTA CAT ATG

• TGC CTA GAT ATC

• UCG CUA CAU AUG

Which statement best describes the relationship that exists among proteins, DNA, and cells?

• proteins combine to produce cells, which produce DNA

• proteins are made up of DNA which determines the cells that are produced

• DNA is made up of proteins, which tell a cell how to function

• Cells contain, DNA, which controls the production of proteins

A segment of DNA has this sequence:

ATA GCA CAT GTA

What is the mRNA sequence transcribed from this segment?

• TAT CGT GTA CAT

• TAT GCT CTA GAT

• UAU CGU GUA CAU

• UAU GCU CUA CAU

This chart shows which amino acids are coded for by different combinations of mRNA nucleotides.

Which amino acids are coded for by an mRNA segment that reads CAG GUG?

• arginine and valine

• isoleucine and arginine

• glutamine and valine

• valine and isoleucine

Which will most likely cause variations to occur within a species?

• competition

• mutation

• mutualism

• predation

Which would most likely produce a mutation that is passed on to offspring?

• radiation changing the DNA sequence in skin cells

• a gamete with an extra chromosome forming

• tobacco smoke altering the genes in the lung cells

• exposure to chemicals altering nerve cell function

How would overexposure to X-rays affect most animals cells?

• it would increase cell specialization in organs

• it would change the sequence of DNA nucleotides in affected cells

• it would produce new necleotides for DNA molecules

• it would cause an increase in red blood cell production

Why is meiosis important for sexual reproduction?

• it allows the zygote formed from fertilization to have triple the chromosome number of the organism

• it allows gametes to have twice the original number of chromosomes of the organism

• it allows gametes to have half the original number of chromosomes of the organism

• it allows the zygotes formed from fertilization to have half the original number of chromosomes of the organism

Which process produces the most variation within a species?

• asexual reproduction

• sexual reproduction

• mitosis

• cloning

How are sexual reproduction and asexual reproduction different?

• sexual reproduction produces offspring identical to the parents, but asexual reproduction produces off spring with traits from both parents.

• asexual reproduction produces offspring identical to the parents, but sexual reproduction produces offspring with traits from both parents

• sexual reproduction only occurs in multi cellular organisms, but asexual reproduction only occurs in unicellular organisms

• asexual reproduction only occurs in multi cellular organisms, but sexual reproduction only occurs in unicellular organisms.