Chapter #12 Test: Genetics

Front

What phase of meiosis does crossing over occur?

Back

Prophase 1

Front

What is a cross of two individuals for a single trait called?

Back

Monohybrid

Front

If a sexually-reproducing organism has 24 chromosomes in its somatic cells, how many chromosomes would you expect in its gametes?

Back

12

Front

What process involves the exchange of genetic material between homologous chromosomes?

Back

Crossing-over

Front

A dihybrid cross shows the possible outcomes of how many traits?

Back

Two traits/characters

Front

What is the term for the observable characteristics of an organism?

Back

Phenotype

Front

What is the genetic makeup of an organism called?

Back

Genotype

Front

What type of allele is expressed when present?

Back

Dominant

Front

What type of allele is only expressed when two copies are present?

Back

Recessive

Front

What is the term for different forms of a gene?

Back

Alleles