question

The image above shows the events that occur as a cell moves between which two phases of the mitotic cell cycle?

answer

prophase to metaphase

question

Chemotherapy is one common treatment for cancer. Which of the following are aspects of chemotherapy?

answer

All of the above are correct: A) Drugs that interfere with cell division are administered to the patient. B) Chemotherapy drugs circulate throughout the entire body. C) Chemotherapy drugs disrupt normal systems that rely on the rapid and constant production of new cells.

question

During which phase of the cell cycle do the chromosomes align in one plane at the center of the cell?

answer

Metaphase

question

A woman who was selected to have her entire genome sequenced would discover that she had at least ___ homolog(s) for every chromosomal gene.

answer

2

question

The stage of the cell cycle in which the chromosomes are aligned in single file between the poles is:

answer

metaphase.

question

Which of the following happens in cytokenesis?

answer

The cytoplasm is divided

question

In multicellular organisms, the cells that undergo mitotic cellular division but not meiotic cell division are called:

answer

somatic cells

question

The process of cytokinesis often occurs simultaneously with which phase?

answer

telophase

question

What type of chromosomal abnormality leads to the phenotype known as Down syndrome?

answer

trisomy 21

question

In asexual reproduction, daughter cells inherit their DNA from ____________________.

answer

a single parent

question

Which of the following lists most accurately represents the sequence of the phases of the mitotic cell cycle? 1. telophase 2. metaphase 3. anaphase 4. prophase 5. interphase

answer

5-4-2-3-1

question

The formation of a multicellular organism from a fertilized egg is called development. Development is accomplished through the processes of:

answer

mitosis and cytokinesis

question

In mitosis, telophase occurs when:

answer

Both A) and B).

question

The Gap 1, DNA Synthesis, and Gap 2 phases of the cell cycle are collectively called:

answer

interphase

question

How many daughter cells are produced from one cell undergoing mitosis?

answer

2

question

Eukaryotic cells can divide by:

answer

both mitosis and meiosis.

question

Nondisjunction:

answer

is the unequal division of the genetic material during cell division

question

Mitosis produces TWO (2) daughter cells that:

answer

are genetically identical to each other and to the original parent.

question

The linear strands of DNA in eukaryotes are efficiently packed within the nucleus of the cell. The packing of DNA strands are mediated by proteins called:

answer

histones

question

Which of the following combinations of sex chromosomes is never seen in human beings?

answer

YYY

question

Which of the following statements about the similarities and difference between chemotherapy and radiation therapy as cancer treatments is INCORRECT?

answer

All of the above are CORRECT statements about the similarities between chemotherapy and radiation therapy: A) In radiation therapy, the nearby tissue may be harmed, while in chemotherapy, the rate at which healthy cells divide may be reduced. B) Both chemotherapy and radiation therapy have side-effects. C) Both chemotherapy and radiation therapy work by disrupting cell division. D) The drugs used in chemotherapy circulate throughout the entire body, while radiation therapy directs high energy radiation only at the part of the body where the tumor is located.

question

Beginning with interphase, put the following stages of the mitotic cell cycle into the correct sequence by numbering them from 1-6.

answer

Interphase (Gap-1) Prophase Metaphase Anaphase Telophase Cytokenesis

question

Which of the following is TRUE about sex determination in humans?

answer

The father's sperm determines the gender of a baby.

question

Which of the following are the three stages of interphase (in the mitotoc cell cycle)?

answer

Gap-1, S-phase and Gap-2

question

Strands of chromatin condense to form visible chromosomes at which of the following phases of the mitotic cell cycle?

answer

Prophase

question

Which of the following statements is NOT correct of human sex chromosomes?

answer

All diploid cells have both an X and a Y chromosome

question

A karyotype is a physical representation (usually a photograph) of all of the chromosomes in a single cell; however, the cell must be in mitotic metaphase when the karyotype is made. Why?

answer

Metaphase is the only stage of the cell cycle in which the chromosomes have condensed and aligned, but have not yet separated.

question

Generally speaking, when the female gamete (ovum) is fertilized by the male gamete (sperm), a fusion of their nuclei restores the number of chromosomes to:

answer

the diploid condition.

question

A man having the "super male" genotype, meaning he has one extra Y-chromosome (XYY) marries a woman who is "meta female," having an extra X-chromosome (XXX). All of the following are possible genotypes of their children, EXCEPT:

answer

YY

question

Aneuploidy (an abnormal number of chromosomes) occurs due to one particular erroneous meiotic event called:

answer

nondisjunction (chromosomes don't separate).

question

During DNA replication, each strand serves as a _____________ for the new ________________ strand.

answer

template; complementary

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