Chapter 9 and Part of 10 Quiz #3

Gene p53 A. Initiates apoptosis, thus cutting the cell's DNA into pieces B. Increases the growth rate of malignant tumors C. Causes cancer cells to divide more rapidly D. All of the above

A. Initiates apoptosis, thus cutting the cell's DNA into pieces

Crossing-over is a characteristic of A. Prophase I B. Prophase II C. Metaphase II D. All of the above

A. Prophase I

Phase of cell that has the start of two cells, each with their own stuff in them. A. Telophase B. Interphase C. Prophase D. Anaphase

A. Telophase

Homologous chromosomes A. have the same genes in the same places. B. are identical. C. have the same alleles. D. All of the above are correct.

A. have the same genes in the same places.

A nondisjunction event occurs when A. homologous chromosomes did not separate correctly. B. non-homologous chromosomes did not separate correctly. C. daughter cells did not undergo cytokinesis correctly. D. None of the above is correct.

A. homologous chromosomes did not separate correctly.

Trisomy means A. that three copies of a chromosome are present. B. Down syndrome. C. that only three cells are present. D. none of the above.

A. that three copies of a chromosome are present.

The knot-like structure holding the strands of DNA together is the A. Chromatid B. Centromere C. Centrosome D. Chrromomere

B. Centromere

Which of the following is true of interphase? A. The chromosomes line up on the equatorial plane. B. DNA replication occurs in this phase. C. The DNA in the cell halves. D. All of the above are true.

B. DNA replication occurs in this phase.

During which phase of mitosis do the chromosomes line up at the middle of the cell? A. Prophase B. Metaphase C. Anaphase D. Telophase

B. Metaphase

Phase of cell that looks like loose noodles in chicken noodle soup. A. Anaphase B. Prophase C. Telophase D. Metaphase

B. Prophase

During what stage of the cell cycle does the DNA replicate? A. G1 phase B. S phase C. G2 phase D. mitosis

B. S phase

Haploid cells A. carry two copies of the genetic information. B. carry one copy of the genetic information. C. carry partial copies of the genetic information. D. are mutant.

B. carry one copy of the genetic information.

Double-factor crosses A. follow 2 alleles for 1 gene. B. follow the alleles for 2 genes. C. look at up to 4 alleles for 1 gene. D. None of the above are correct.

B. follow the alleles for 2 genes.

Reduction division occurs A. in meiosis II. B. in meiosis I. C. in mitosis. D. after fertilization.

B. in meiosis I.

A woman with blood type O and a man with blood type AB have a child together. What are the possible blood types of this child? A. AB or O B. A, B, or O C. A or B D. AB, A, B, or O

C. A or B

Phase of cell that has the V's pulling apart, moving to the north and south poles. A. Metaphase B. Telophase C. Anaphase D. Prophase

C. Anaphase

The process of forming specialized cells within a multicellular organism is known as A. Cellular synthesis B. Antimetabolite formation C. Differentiation D. None of the above

C. Differentiation

What is the key difference between mitosis and meiosis? A. Mitosis involves two rounds of cell division, whereas meiosis involves one round of cell division. B. DNA is not split between cells in meiosis, but this does occur during the mitosis. C. Mitosis produces cells genetically identical to the parent, whereas meiosis produces cells with half the genetic information as the parent. D. None of the above is correct.

C. Mitosis produces cells genetically identical to the parent, whereas meiosis produces cells with half the genetic information as the parent.

The process of separating homologous chromosomes and the the genes they carry is called A. Independent assortment B. Synapsis C. Segregation D. None of these

C. Segregation

Chromosomes are most likely to appear to be lining up near the middle of the cell during which phase of mitosis? A. interphase. B. prophase. C. metaphase. D. telophase.

C. metaphase.

Genes that are found only on the X chromosome in humans most consistently illustrate A. pleiotrophy. B. the concept of diploid organisms. C. sex-linkage. D. All of the above are correct.

C. sex-linkage.

BbCCDd is the genotype of an organism. How many different types of gametes can this organism produce? A. 1 B. 2 C. 3 D. 4

D. 4

Which statements is/are true about sexual reproduction? A. It is a successful method of exchanging genetic information B. It involves shuffling of genetic information C. it requires that the chromosome number be reduced for the formation of the gametes D. All of the above

D. All of the above

A homozygous organism A. has the same alleles at a locus. B. has the same alleles at a gene. C. produces gametes that all carry the same allele. D. All of the above are correct.

D. All of the above are correct.

Which of the following types of information do cells use to determine if they will divide? A. genetic health. B. their current location. C. the need for more cells. D. All of the above are correct.

D. All of the above are correct.

p53 mutations lead to cancer because A. DNA damage is not repaired. B. mutated cells are allowed to grow. C. multiple mutations in the cell's regulatory proteins occur. D. All of the above are correct.

D. All of the above are correct.

Genetic diversity in the gametes of an individual is generated through: A. mitosis. B. independent assortment. C. crossing-over. D. Both B and C.

D. Both B and C.

Phase of cell that looks like a hair ball or like spaghetti. A. Prophase B. Anaphase C. Telophase D. Interphase

D. Interphase

Phase of cell that has the things line up in the middle. A. Interphase B. Prophase C. Telophase D. Metaphase

D. Metaphase