Unit 8.5 Quiz 4

A segment of DNA that codes for a particular trait:

• nucleus

• karyotype

• chromosome

• gene

Tags

NGSS.HS-LS3-1

When an organism has DIFFERENT alleles for a gene (such as one dominant, one recessive), it is said to be:

• genotyped

• phenotyped

• homozygous

• heterozygous

When an organism has SAME alleles for a gene, it is said to be:

• genotyped

• phenotyped

• homozygous

• heterozygous

The specific genetic combination of alleles of an individual (such as BB, bb, or Bb):

• phenotype

• genotype

• variation

• karyotype

What does heterozygous mean?

• An organism has the same alleles for a trait (BB or bb)

• An organism has different alleles for a trait (Bb)

• When neither allele is dominant

• A different form of a trait

An allele that expresses a trait even if there is only one copy.

• phenotype

• genotype

• codominant

• dominant

• recessive

A trait that is expressed only if both alleles are the same.

• phenotype

• genotype

• codominant

• dominant

• recessive

A tool that traces a trait through several generations:

• Punnett square

• pedigree

• dichotomous key

• cladogram