S25 Genetics Grade P1

Front

What is the genotype of a tall garden pea plant that can produce short offspring?

Back

Tt

Front

What is the probability of producing a short plant from a Tt x Tt cross?

Back

25%

Front

What is the chance of having a son if the previous four children are all sons?

Back

50%

Front

What is the phenotypic ratio of offspring from a heterozygous black mouse (Bb) crossed with a white mouse (bb)?

Back

2 Black: 2 White

Front

What is the phenotype of a heterozygous parent with genotype Yy?

Back

yellow

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 is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from genetic crosses.

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.