Exam 8: The Cellular Basis of Reproduction and Inheritance

Karyotyping

The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called

According to the graph, at what maternal age is the incidence of Down syndrome equal to five times the incidence at age 40?

Which of the following occurs during interphase?

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 comparing a frog cell in metaphase of mitosis with one in metaphase I of meiosis, how would tell you which was which?

Which of the following is probably the main factor responsible for the phenomenon of density-dependent inhibition?

You are a medical student and are reviewing a case study about a past patient. The patient was 4 feet 8 inches tall at age 38, was unable to have children, and had cognitive impairments. The patient also had an irregular number of chromosomes. What diagnosis would you give the patient?

Mature human neuron (nerve) cells and muscle cells

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 pair of sex chromosomes found in a human male is most like

Which of the following statements regarding the cell cycle control system is false?

Sister chromatids are

Oncologists (medical doctors who treat cancer patients) routinely take biopsies (samples) of tissue from patients to determine whether the tissue is cancerous or not. What would be the best technique to use to determine whether cells from the tissue sample are cancerous?

Which of the following statements is false?

A skin cell of a red fox has 34 chromosomes. You look at the cell under a microscope and see that it has 34 chromosomes and one nucleus. Several hours later, you look at the same cell again and see that it has double the amount of DNA and one nucleus. A little while later, you see that it has 68 chromosomes and two nuclei. What stage of the cell cycle was this cell in when you viewed it at each time point?

A benign tumor differs from a malignant tumor in that a benign tumor

At a chiasma, two ________ are attached to each other.

Which of the following must occur for a plant or animal to grow and develop normally?

Which of the following helps maintain the structure of chromosomes and control the activity of genes?

Both mitosis and meiosis are preceded by