Genetics Worksheet

What does a pedigree chart represent?

• The blood type of an individual

• The physical characteristics of an individual

• The inheritance of a specific genetic trait from one generation to the next

• The environmental impact on genetics

Which of the following terms refers to a pair of alleles that are identical?

• Heterozygous

• Homozygous

• Genotype

• Phenotype

What does a Punnett square help determine?

• An individual’s physical appearance

• The likelihood of offspring inheriting specific traits

• The family tree of an individual

• The gene sequence of a trait

Which of the following is a dominant allele for a genetic disorder like NF1?

• nn

• Nn

• NN

• nn

What does the symbol "Nn" represent in a pedigree chart?

• A person with two recessive alleles

• A person with one dominant and one recessive allele

• A person with two dominant alleles

• A person who is unaffected by a genetic trait

In a Punnett square for a trait, the probability of offspring inheriting a specific allele is based on:

• A) The dominant gene only

• B) The recessive gene only

What is the probability of a child inheriting a recessive disorder if both parents are carriers (heterozygous)?

• 100%

• 75%

• 50%

• 25%

What symbol is used to represent a male in a pedigree chart?

• A square

• A circle

• A filled circle

• A diamond

If a disorder is autosomal recessive, how many recessive alleles must an individual inherit to express the condition?

• One

• Two

• Three

• Four

What is the term for a person who carries one copy of a recessive allele for a disorder but does not show symptoms?

• Affected individual

• Homozygous recessive

• Carrier

• Phenotype