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53 Cards in this Set
- Front
- Back
What does asexual reproduction produce?
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clones
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What is an advantage of sexual reproduction?
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it increases genetic diversity
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What does cytokinesis result in during telophase II?
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four haploid cells
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When does crossing- occur?
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during prophase I
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When does DNA replication occur?
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prior to prophase I
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During the production of what does cytoplasm divide unequally in meiosis?
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production of egg cells
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What life cycle would it be if, during an animal's life cycle, the gametes are the only haploid cells?
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a diploid life cycle
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When is the zygote the only diploid cell?
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in the haploid life cycle
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Is alternation of generations a type of asexual reproduction?
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NO
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What kind of reproduction is budding, fragmentation, and fission
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asexual reproduction
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Does cytokinesis provide new genetic combinations?
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No
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Does random fertilization, independent assortment, and crossing-over provide new genetic combinations?
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Yes
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random distribution of homologous chromosomes during meiosis
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independent assortment
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multicellular, haploid phase in alternation of generations
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gametophyte
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a method of sexual reproduction in which the body breaks in several pieces?
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fragmentation
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produces spores in the diploid hase of a plant's life cycle
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sporophyte
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small cell with very little cytoplasm that is formed during oogenesis and eventually dies
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polar body
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all copies of the single parent's genes are passed to the offspring
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asexual reproduction
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portions of a chromatid on one homologous chromosome break off and trade places with the corresponding portion on one of the chromatids of the other homologous chromosome
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crossing-over
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the process by which gametes are produced in male animals
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spermatogenesis
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new individuals split off from existing ones
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budding
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the union of sperm and egg cells to produce a diploid zygote
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fertiliaztion
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the activities in the life of an organism from one generation to the next
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life cycle
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haploid reproductive cell of plants
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spore
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offspring that is generally identical to its parent
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clone
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female gamete, also called an egg
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ovum
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the process by which gametes are produced in female animals
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oofenesis
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homologous chromosomes move to opposite poles of the cell
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anaphase I
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What are gametes produce by in the haploid life cycle?
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mitosis or meiosis
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What is the zygote produced by?
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fusion
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How many sperm cells does spermatogenesis produce?
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4 sperm cells
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This is not part of meiosis, but it increases the number of possible genetic combinations
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Random fertilization
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What does Asexual reproduction limit?
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genetic diviersity
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Crossing-over is an efficient way to produce this, which increases genetic diversity?
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genetic recombination
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What happens when corresponding portions of chromatids on two homologous chromosomes change places?
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crossing- over
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What is often produced in plants during meiosis? These haploid cells later lead to the production of gametes.
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spores
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Increased genetic variation will often increase the rate of this.
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evolution
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a new spindle forms around the chromosomes
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prophase II
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Chromatids remain attached at their centromeres as the spindle fibers move the homologous chromosomes to opposite poles of the cell
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anaphase I
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A nuclear envelope forms around each set of chromosomes, the spindle breaks down, and the cytoplasm divides, resulting in four haploid cells.
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telophase II
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Chromosomes gather at the poles; the cytoplasm divides
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telophase I
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The nuclear envelope breaks down; genetic material is exchanged through crossing-over.
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prophase I
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Chromosomes line up at the equator.
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metaphase II
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Pairs of homologous chromosomes line up at the equator.
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metaphase I
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Cenromeres divide, enabling the chromatids, now called chromosomes, to move to opposite poles of the cell.
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anaphase II
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What stage of Meiosis is this?
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prophase II
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What stage of Meiosis is this?
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prophase I
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What stage of Meiosis is this?
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telophase I and cytokinesis
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What stage of Meiosis is this?
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telophase II and cytokinesis
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What stage of Meiosis is this?
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metaphase II
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What stage of Meiosis is this?
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anaphase I
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What stage of Meiosis is this?
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metaphase I
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What stage of Meiosis is this?
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anaphase II
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