Source: Adapted from C

question 9

Multiple Choice

Source: Adapted from C. A. Huether et al., Maternal age specific risk rate estimates for Down syndrome among live births in whites and other races from Ohio and Metropolitan Atlanta, 1970-1989, Journal of Medical Genetics 35: 482-90 (1998) . Figure 8.20B Maternal age and incidence of Down syndrome
-In some plants such as mosses and ferns, there is a multicellular stage in the life cycle that is haploid and a different stage that is diploid. What can you conclude from this?

• A) The haploid cells must undergo twice as much mitosis in order to produce a diploid stage.
• B) Haploid cells must undergo mitosis to produce a multicellular haploid stage.
• C) Meiosis must happen over and over to produce as many haploid cells for a multicellular haploid plant.
• D) Haploid cells must undergo meiosis to form gametes.

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Definitions:

Secure Attachment

A form of attachment characterized by children who show some distress when their caregiver leaves but are able to compose themselves knowing that their caregiver will return.

Positive Social Contact

Interactions between individuals that contribute to a sense of well-being, belonging, and mutual respect.

Romanian Orphanages

Institutions in Romania, noted in studies for their impact on child development due to deprivation and neglect experienced by children.