Pairs of chromosomes with almost identical geneticcomposition and that are found in cells of both males andfemales are calleda. sex chromosomes.b. autosomes.c. polyploid.d. chromatids.

At the end of meiosis I, which of the following remains attached? A. Sister chromatids B. Homologous chromosomes C. Tetrads 36

Which types of microtubules are essential for the major events occurring during anaphase B ? A. Inter-polar and astral.B. Kinetochore and astral.C. Astral only.D. Kinetochore and inter-polar.E. Kinetochore only.

Gametes contain one of each kind of chromosome because   Select one: A.  The homologous chromosomes separate during meiosis. B.  Crossing-over occurs during prophase I. C.  Only one replication of DNA occurs during meiosis. D.  The chromatids separate during meiosis.

The chromosome count of a cell at the beginning of prophase I is 12. What is the centromere count in a gamete belonging to the same organism?   A. 48   B. 24   C. 6   D. 12   E. None of the answers are correct

What is necessary for a chromosome bridge to occur?     a.    centromeres are necessary      b.    chromosome bridges only apply to meiosis      c.    centromeres and fusion      d.    fusion is necessary      e.    applies only to mitosis and involves fusion and centromeres

What would happen to the chromosome number in gametes and offspring if ​gametes were formed by the mitotic process instead of the meiotic process?

For most dividing cells in a diploid organism, the time spent in mitosis is approximately 4% of the total time of the cell cycle. In a population of continually dividing cells isolated from this organism, most of the cells would... A.have highly condensed chromatin. B.  be in interphase (G1 or S or G2). C. be in mitosis. D.  be in meiosis.

and down syndrome the victim has an extra chromosome 21. Therefore, down syndrome is a kind of ___ and results from ___. A. aneuploidy... nondisjunction of chromosome 21 during meiosis B. polyploidy... occurrence of meiosis without cytokinesis C. translocation… insertion of a transposon into chromosome 21 D. replication air… An extra cycle of DNA synthesis during the five phase

The use of chemotherapy drugs that interfere with the cell cycle is avoided during pregnancy. This is because they: a. Ingibit the synthesis of proteins by the mitochondria. b. Block the production of ATP by the ribosomes. c. Interfere with the ability of the fetal cells to replicate. d. Cause nondisjunction of the chromosomes, causing fetal cells to have two of each chromosome instead of three.