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With increasing age, women are at increased risk of having a baby with a chromosomal abnormality such as Down syndrome. Why is age a risk factor?

Petunias can be blue, red, or violet. When a blue flower is crossed with a red flower, all the resulting flowers are violet. Two violet petunias are crossed. Which is the most probable result of the cross?

With increasing age, women are at increased risk of having a baby with a chromosomal abnormality such as Down syndrome. Why is age a risk factor?

A nurse is caring for a client following a CVA and observes the client experiencing severe dysphagia.  The nurse notifies the provider.  Which of the following nutritional therapies will likely be prescribed?

Rb and other proteins that negatively regulate the cell cycle are sometimes called tumor supressors. Why do you think the name tumor suppressor might be appropriate for these proteins?

Use a Punnett square to predict the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous). What is the phenotypic ratio of the offspring?

Which of the following statements cannot be inferred from the karyotype shown?

A duplicate copy of all of the hereditary information contained in the nucleus of eukaryotic cells is made during what stage of the cell cycle?

Let Y = yellow flowers and y = white, and T = tall plants and t = dwarf. What are the genotypes of the gametes that are produced by a plant that is heterozygous for both traits?

If DNA replicates in a semi-conservative manner, what is the outcome?