Seminar 2024 dna genetics review 1

What is a gene?

• An entire chromosome that  codes for a trait
• a piece of clothing
• a piece of a DNA on chromosome that codes for a trait
• Chemical messengers in your brain that code for a trait

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What is heredity?

• A kind of genetic disorder
• The way DNA divides
• A trait you inherit from your parents
• The passing down of traits from parents to children

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DNA is a molecule made up of which of the following components?

• deoxyribose (sugar)

• phosphates

• fatty acid

• blood cells

• nitrogenous bases

Which statement best supports why many offspring look similar to their parents?

• Offspring inherit traits from only one parent.

• Parents choose which traits to pass on to their offspring.

• Offspring inherit traits from both parents.

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the child or young of two parents

• phenotype

• species

• purebred

• offspring

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Distinguishing characteristics that are inherited, such as eye color or leaf shape.

• Traits

• Alleles

• Genes

• Mendel

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The passing of traits from parent to offspring is called _____.

• heredity

• genetics

• DNA Replication

• photosynthesis

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What is similar of DNA of all organisms?

• composed of the four nucleotides

• have the same number of genes

• members of the same phylum

• they all have mutations

How do cells become specialized?

• specific genes are activated

• certain genes are deleted

• different genes are duplicated

• cells have different parts of DNA

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How many chromosomes do humans have?

• 23

• 46

• 13

• 100

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