Genetics- Punnett Squares

Front

In a Punnett square, a lower case letter stands for a ____________ allele.

Back

recessive

Front

How many chromosomes are in a human egg cell and passed down from a mother to her child?

Back

23

Front

What is it called when the alleles in a genotype are different?

Back

Heterozygous

Front

B = brown fur & b = white fur. In the Punnett square, what is the probability for white fur?

Back

50%

Front

T - tall and t = short. In the Punnett square below, what belongs in the missing square?

Back

tt

Front

What is a Punnett square used for?

Back

To predict the genetic makeup of offspring from parental genotypes.

Front

Define dominant allele.

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

Define recessive allele.

Back

An allele that only expresses its trait when two copies are present.

Front

What does homozygous mean?

Back

Having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene.