Genetics Review

Fill in the Yellow Box

• Bb

• BB

• bb

What is a section of DNA called?

• phenotype

• gene

• chromosome

• mutation

Having 2 of the same type of allele is also called __________.

• purebred

• homologous

• heterzygous

• hybrid

What is the physical expression of a trait?

• genotype

• mutation

• genetic disorder

• phenotype

What do the letters nn represent?

• recessive genes

• dominant genes

• heterzygous genes

• homozygous genes

What does heterozygous mean?

• the different forms of a trait (red hair, brown hair, etc)

• when an organism has two of the same alleles for a trait (ex. RR)

• when an organism has two different alleles for a trait (ex.Tt)

• neither gene is dominant over the other and a blend of both traits appear in the offspring

Which genotype should go in space #3?

• DD

• dd

• dD

• Dd

What are the different variations of a gene ?

• mutation

• genotype

• phenotype

• allele

Fill in the Yellow Box

• AA

• Aa

• aa

What controls genetic traits?

• chromosomes

• Punnett Squares

• Pedigrees

• genes