Unit 3 Review: Inheritance, Punnett squares, and Probability

Front

What is a genotype?

Back

The organism's genetic makeup or allele combination.

Front

What does homozygous mean?

Back

There are two identical alleles (TT or tt).

Front

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

Back

It represents a heterozygous genotype with one dominant allele (B) and one recessive allele (b).

Front

What is a phenotype?

Back

The physical appearance or visible traits of an organism.

Front

What is the probability of offspring having white fur if B = brown fur and b = white fur?

Back

50%.

Front

What does a Punnett square illustrate?

Back

It illustrates the possible genetic combinations of offspring from two parents.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in the phenotype.

Front

What does heterozygous mean?

Back

There are two different alleles (Tt or Hh).

Front

What is the purpose of using a Punnett square?

Back

To predict the probability of certain traits in offspring.

Front

What does it mean if an organism is homozygous recessive?

Back

It has two identical recessive alleles (bb).