SOL Review: DNA, Genetics, and Evolution

Which statement is best supported by the phylogenetic tree shown?

• Species W first came into existence 10 million years ago

• Species V is still alive today and is the oldest species.

• Species X, Y, and Z became extinct 20 million years ago

• Species W is still developing from a prior species

According to modern biologist, hereditary variations are due to...

• use or lack of use of organs

• inheritance of characteristics aquired during development

• need for adapting to a changed enironment

• genetic changes resulting from mutations and recombinations

Two fruit flies are crossed with each other. The offspring is a female and will inherit which set of chromosomes?

• 
• 
• 

Mendel's idea that inheriting a particular allele for eye color does not affect the ability to inherit any other allele for hair color. For example, you could inherit your mom's hair color and your father's eye color. One trait does NOT affect the inheritance of other.

• Independent Assortment

• Sex Linkage

• Crossing over

• Mitosis

Red flower color is dominant to white flower color in rose plants. What is the expected result of a cross between two heterozygous rose plants?

• 100 red

• 75 red, 25 white

• 50 red, 50 white

• 25 red, 75 white

To classify an organism a scientist finds in the field, which of these will the scientist first compare to other known organisms?

• diet

• niche

• physical structure

• reproductive method

Darwin's explanation for evolution was dependent on which scientific concept?

• the ability of organisms to learn

• significance of social behaviors to survival

• the existence of variations in a population

• the relationship between size and survival

The weakness of hydrogen bonds between the bases of DNA allows-

• rearrangement of the sequence of bases to take place

• base pairs to separate during transcription and replication

• new bases to be separated into the DNA molecule

• conversion of bases to amino acids in the event of cell starvation

Which of these would most likely result in a change to the current classification of an organism?

• discovering organisms with similar physical traits in fossil record

• finding a related organism that was previously considered extinct

• linking the organism to different ancestors through DNA sequencing

• Observing organisms that occupy the same ecological niche

Which DNA triplet would transcribe and translate to produce the amino acid Histidine?

• CGA

• GTG

• CUC

• UUU