Genetics Vocabulary

A ________ is a segment of DNA that codes for a trait.

• chromosomes

• gene

• mitosis

• eggs

Genes come in pairs because you have 23 pairs of chromosomes. True or False?

• True

• False

Aa, DD, Bb, yy are all examples of _______

• genotypes

• phenotypes

If something is heterozygous, it is also _____

• purebred

• hybrid

• dominant

• recessive

If something is homozygous, it can also be called____

• phenotype

• genotype

• hybrid

• purebred

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

Which of the following is homozygous recessive?

• Tt
• tt
• TT
• T

Which of the following is an example of phenotype?

• bb
• blue eyes

__ are the the different versions of a gene. Letters are used to represent each version.

For example: B - brown or b - blue

• genes

• alleles

• trait

• phenotype