Understanding Heredity and DNA (SC.7.L.17.1)

Which of the following statements best describes the relationship between genes and chromosomes in the context of heredity?

• Genes are segments of DNA that are found on chromosomes and determine specific traits.

• Chromosomes are made up of proteins that encode genetic information.

• Genes are proteins that are responsible for the structure of chromosomes.

• Chromosomes are lipids that store hereditary information.

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A researcher is examining a genetic disorder that appears in every generation of a family. What strategic reasoning could the researcher use to hypothesize about the inheritance pattern of this disorder?

• The disorder is likely caused by a recessive allele that skips generations.

• The disorder is likely caused by a dominant allele that is present in every generation.

• The disorder is likely caused by environmental factors rather than genetic inheritance.

• The disorder is likely caused by a mutation that occurs randomly in each generation.

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In a genetic experiment, two plants with purple flowers are crossed, and some of the offspring have white flowers. What concept can explain this observation?

• The purple flower trait is dominant, and the white flower trait is recessive.

• The white flower trait is dominant, and the purple flower trait is recessive.

• Both traits are codominant, resulting in a blend of colors.

• The flower color is determined by environmental factors, not genetics.

Consider a scenario where a child exhibits a genetic trait that neither parent visibly shows. What strategic reasoning could explain this genetic occurrence?

• The trait is likely a result of a new mutation in the child's DNA.

• The trait is likely recessive, and both parents are carriers of the allele.

• The trait is likely influenced by the child's diet and lifestyle.

• The trait is likely dominant, but the parents' alleles were not expressed.

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Which of the following best explains how genetic information is organized within a cell?

• Genetic information is stored in the cell membrane and controls cell functions.

• Genetic information is organized into genes, which are located on chromosomes within the nucleus.

• Genetic information is stored in the cytoplasm and is used during cell division.

• Genetic information is encoded in proteins that float freely in the cell.

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The passing of physical characteristics from parent to offspring is __________.

• genetics
• heredity
• genes
• traits

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A version of a gene is called a(n)

• allele

• characteristic

• specific gene

• trait

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An offspring will receive how many alleles from each parent to determine a specific trait?

• one
• two
• three
• five

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Which process ensures genetic variation in sexually reproducing organisms?

• Mitosis

• Meiosis

• DNA replication

• Protein synthesis

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What is genetic variation?

• The lack of differences among individuals in a population

• The uniformity of traits in a species

• Differences in the genetic makeup among individuals within a population

• The study of heredity

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