Exploring Traits, Variation, and Alleles in Genetics

What does genetics study?

• The structure of cells

• The passing of traits from parents to offspring

• The chemical composition of DNA

• The process of photosynthesis

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What is an example of a trait with continuous variation?

• Earlobe attachment

• Height

• Tongue rolling

• Blood type

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What is the difference between an acquired and an inherited trait?

• There is no difference; they are the same

• Acquired traits are genetic, while inherited traits are not

• Inherited traits can be passed to offspring, while acquired traits cannot

• Acquired traits are always visible, while inherited traits are not

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What determines the specific characteristic of an organism?

• A protein

• A cell

• A gene

• An allele

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What is an allele?

• A type of protein

• A form of a gene

• A cell component

• A DNA sequence

Which allele is expressed if both a dominant and a recessive allele are present?

• Neither allele

• The dominant allele

• Both alleles equally

• The recessive allele

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What is required for a recessive trait to be expressed?

• One dominant allele

• Two recessive alleles

• Two dominant alleles

• One recessive allele

Can two parents with a dominant trait have an offspring with a recessive trait?

• Only if the parents are heterozygous

• Yes, but it's not common

• No, never

• Yes, always

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What does it mean if someone is heterozygous for a trait?

• They have one allele for the trait

• They have two identical alleles for a trait

• They do not have any alleles for the trait

• They have two different alleles for a trait

What is a Punnett square used for?

• To determine cell structure

• To analyze DNA sequences

• To measure protein levels in cells

• To predict the outcome of genetic crosses