Unit 2 exam review #2

Front

What type of mutation is likely to increase the risk of cancer?

Back

Frameshift mutation in a tumor suppressor gene.

Front

Why are Short Tandem Repeats (STRs) useful in DNA fingerprinting?

Back

They are highly variable among individuals, making it easier to identify unique DNA profiles.

Front

In which stage of meiosis do synapsis and formation of tetrads occur?

Back

Prophase I.

Front

What is the result of a trait that shows incomplete dominance?

Back

A blend of the two alleles in the heterozygote.

Front

Which characteristic is NOT associated with cancer cells?

Back

Normal contact inhibition.

Front

What is a frameshift mutation?

Back

A mutation that results from the insertion or deletion of nucleotides, altering the reading frame of the gene.

Front

What role do tumor suppressor genes play in cancer prevention?

Back

They help regulate cell division and prevent uncontrolled growth.

Front

How do STRs contribute to genetic diversity?

Back

They vary in number among individuals, leading to unique genetic profiles.

Front

What occurs during Prophase I of meiosis?

Back

Homologous chromosomes pair up and exchange genetic material through crossing over.

Front

What is incomplete dominance in genetics?

Back

A situation where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.