Biology Reproduction and Genetics Review

Front

What are mutations in sex cells?

Back

Changes in the genetic material that may be transmitted to the next generation.

Front

Where can a gene mutation be passed to offspring?

Back

A gamete.

Front

What is the dominant gene for singing in canaries?

Back

S (singing) is dominant over s (non-singing).

Front

What percentage of offspring from a hybrid singing canary and a non-singing canary will likely sing?

Back

50%.

Front

What type of mutation involves one base being traded for another?

Back

Substitution.

Front

What is Down syndrome?

Back

A genetic disorder caused by the presence of an extra chromosome 21.

Front

What is the role of gametes in sexual reproduction?

Back

Gametes are the sex cells that carry genetic information to offspring.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present; recessive traits require two recessive alleles.

Front

What is meiosis?

Back

A type of cell division that produces gametes with half the number of chromosomes.

Front

What is a phenotype?

Back

The observable characteristics or traits of an organism.