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The ability to reproduce sexually or asexually __________. |
is a criterion for distinguishing living things from nonliving matter |
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Asexual reproduction __________. |
produces offspring genetically identical to the one single parent |
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Sexual reproduction is different from asexual reproduction in which way? |
Sexual reproduction requires fertilization of an egg by a sperm. |
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Most of an organism’s DNA is carried by its _____. |
chromosomes |
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Replication of chromosomal DNA occurs __________. |
before a cell divides |
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With the exception of gametes, a human cell contains _____ chromosomes. |
46 Human somatic cells contain 22 pairs of nonsex chromosomes (autosomes) and 2 sex chromosomes. |
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The cell cycle is a series of events that occur in which order? |
G1, S, G2, mitosis, cytokinesis |
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Which of the following is a function of the cell cycle that involves mitosis in eukaryotes? |
cell replacement |
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Which of the following is the correct order for the four main stages of mitosis? |
prophase, metaphase, anaphase, telophase |
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A benign tumor is a condition in which tumor cells __________. |
remain confined to their original site; The spread of cancer cells to new locations is called metastasis. |
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A typical body cell with 23 pairs of chromosomes is called a _____. |
somatic cell A typical body cell is diploid. |
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Sexual reproduction requires the cellular process of _____ followed by _____. |
meiosis … fertilization Meiosis produces gametes and a gamete from one individual unites with a gamete from another individual during fertilization. |
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Meiosis and cytokinesis result in the formation of __________. |
four haploid cells In mitosis a cell that has doubled its genetic material divides into two diploid daughter cells. In meiosis a cell that has doubled its genetic material undergoes two rounds of division, resulting in four haploid cells. |
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The process of meiosis accomplishes which of the following choices? |
It produces four haploid cells and allows exchange of genetic material between homologous chromosomes. |
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Which of the following statements is correct? |
Meiosis results in gametes that are used in reproduction. |
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Orientation of homologous pairs of chromosomes at metaphase I results in alternative arrangements that contribute to genetic variation in offspring. The orientation is called _____. |
independent assortment |
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Crossing over is __________. |
the exchange of corresponding portions of homologous chromosomes |
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Which of the following statements resulted from research on bdelloid rotifers regarding sexual reproduction? |
Bdelloid rotifers have evolved for millions of years without any sexual reproduction. |
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Accidents can occur in meiosis wherein members of a chromosome pair fail to separate at anaphase. This is called _____. |
nondisjunction The resulting gametes will have abnormal numbers of chromosomes. |
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Which one of the following combinations of sex chromosomes results in Turner syndrome? |
XO; This is the sex chromosome complement of an individual with Turner syndrome. |
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A consequence of asexual reproduction in a plant is that __________. |
its entire genetic legacy can remain intact |
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