Unit 4: Genetics Review

Front

If a person has two of the same alleles for a given trait, that person is said to be __________ for that trait.

Back

homozygous

Front

The scientific study of heredity is called __________.

Back

Genetics

Front

What is a phenotype?

Back

Observable physical characteristics.

Front

True or False: Alleles are always found in pairs.

Back

True

Front

In genetics, what does 'T' represent if 'T' is tall and 't' is short?

Back

T represents tall.

Front

What is the term for different forms of a gene?

Back

Alleles

Front

What is the genetic makeup of an organism called?

Back

Genotype

Front

What is the term for the physical expression of a trait?

Back

Phenotype

Front

In a Punnett square, what does 'Tt' represent?

Back

A heterozygous genotype.

Front

What is the probability of getting a homozygous recessive offspring from two heterozygous parents?

Back

25%.