Genetics Review

Front

What is the genetic makeup of an organism?

Back

Genotype

Front

What are the different variations of a gene?

Back

Alleles

Front

What is the physical expression of a trait?

Back

Phenotype

Front

When an organism has two different alleles for a trait (e.g., Tt)

Back

Heterozygous

Front

when an offspring has two of the same alleles for a trait

Back

homozygous

Front

What are the letters Ss an example of?

Back

heterozygous genes

Front

What do the letters nn represent?

Back

Homozygous genes

Front

What goes in the missing square?

Back

aa

Front

A homozygous dominant chicken with black feathers is crossed with a heterozygous chicken with black feathers. What are the percentages of the possible genotypes?

Back

50% BB and 50% Bb

Front

How many alleles does an offspring inherit from each parent for each trait?

Back

1