Science Article: Punnett Square

What is the primary purpose of a Punnett square in genetics?

• To predict the possible traits of offspring based on parental genetics

• To determine the exact genetic makeup of an individual

• To identify mutations in genes

• To calculate the probability of genetic disorders

Who developed the Punnett square method?

• Reginald C. Punnett

• Gregor Mendel

• James Watson

• Francis Crick

What does it mean if an individual is homozygous for a gene?

• They have two identical alleles for that gene

• They have two different alleles for that gene

• They have only one allele for that gene

• They have no alleles for that gene

In a Punnett square, if one parent is homozygous dominant (AA) and the other is homozygous recessive (aa), what will be the genotype of the offspring?

• Aa

• AA

• aa

• A

What is the probability of having a homozygous recessive (aa) offspring if both parents are heterozygous (Aa)?

• 25%

• 50%

• 75%

• 0%

Which of the following describes a dominant allele?

• An allele that expresses its trait even if only one copy is present

• An allele that only expresses its trait if two copies are present

• An allele that is always recessive

• An allele that cannot be inherited

If both parents are heterozygous (Aa), what is the probability that the offspring will show the dominant trait?

• 75%

• 25%

• 50%

• 100%