Semester 2 Review: Heredity and Genetics

Why is DNA important?

• It is in everything

• It serves as the blueprint for traits of all living things

• Because we eat it every day for energy

• It is very small and complicated

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Asexual Reproduction

• Creates a genetically identical copy of the parent

• Creates offspring with a mix of genetic information

• Requires a mate

• Does not require a mate

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A plant that is heterozygous with blue flowers is crossed with a plant that is heterozygous with blue flowers. What is the probability that the offspring will have yellow flowers?

• 25% (1/4)100% (4/4)

• 50% (2/4)

• 75% (3/4)

• 100% (4/4)

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What is heredity?

• The passing down of traits from parents to offspring.

• The way DNA divides

• A trait you inherit from your parents

• A kind of genetic disorder

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In the DNA molecule, the nitrogen base guanine will bind with

• Adenine

• Guanine

• Thymine

• Cytosine

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Sexual Reproduction

• Mitosis

• Meiosis

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The word gene refers to a

• Replicated chromosome

• Section of DNA that controls a trait or a protein

• Single nitrogen base on the DNA ladder

• Recessive allele

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The cells that are made from meiosis have

• Twice as many chromosomes as the other cells in the organism

• Half as many chromosomes as the other cells in the organism

• An exact copy of the chromosomes in the other cells in the organism

• None of the chromosomes that are present in the other cells in the organism

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DNA contains the genetic information for cells to make

• A double helix

• Genes

• Chromosomes

• Proteins

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Which of the following is an advantage of sexual reproduction?

• Most of the offspring will die, controlling the population

• More offspring are produced

• The offspring have a more genetic variation

• The offspring and the parents are identical

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