Meiosis Review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| A human cell contains __ pairs of sex chromosomes | One
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| The attachment of chromosomes to the spindle apparatus during meiosis I | Has homologous pairs lined up together, with homologues facing opposite spindle poles
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| An individual with a sex chromosome abnormality is concieved when a normal gamete unites with | An egg or sperm produced by nondisjunction
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| An individual with triple X karyotype (47, XXX) has how many barr bodies? | 2
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| The seperation of sister chromatids of a dyad in anaphase II results in | Daughter chromosomes
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| Meiosis serves what two major functions? | Reducing chromosome number and creating genetic diversity
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| ______ is a type of nuclear division that is important in sexual reproduction | Meiosis
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| A _______ allows us to visualize all of a person's chromosomes | karyotype
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| During _____, the gap between the first and second meitotic divisions, no DNA replication occurs | interkinesis
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| Humans have ___ pairs of autosomes | 22
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| In males, the process known as ______, produces sperm, and ________ produces eggs | Spermatogenesis, oogenesis
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| The likelihood of nondisjunction occurring increases with a mother's ___ | age
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| The Y chromosome carries a region known as the _, which codes for most of the "male" characteristics | SRY region
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| A protein complex called the __ holds the sister chomatids together to form a chromosome dyad | centrosome
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| After egg and sperm joins, in a process called ______, the resulting cell is called a(n) _____ | fertilization, zygote
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| During development and after birth, ________ is involved in the continued growth of a child and the repair of tissues at any time. | Mitosis
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| In the body cells, the chromosomes occur in pairs called _________, which carry the same genes in the same locations. | homologues
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| The homologous chromosomes of each pair come together and line up side by side, during meiosis I, in an event called ____ | synapsis
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| The term _______ _____ in sexually reproducing organisms refers to all the reproductive events that occur from one generation to the next | life cycle
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| Mitosis _______ chromosome number | maintains
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| Meiosis _______ the chromosome number of the daughter cells | decreases
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| Monosomy and trisomy result from _____ | nondisjunction
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| Occur in testes and produces sperm | spermatogenesis
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| Occurs only between members of a tetrad, during prophase I | Crossing over
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| A cell with a diploid number of 12 chromosomes undergoes meiosis. What will be the product at the end of meiosis II? | 4 cells, each with 6 chromosomes
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| True or False: Meiosis occurs only at certain times in the life cycle of sexually reproducing organisms, and only in specialized tissues | True
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| Before cell division (of any kind), the _ must first condense into chromosomes | chromatin
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| Different versions of a gene | allele
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| _____ have the same shape, carry the same genes in the same locations | Homologous chromosomes
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| Homologues of each tetrad seperate, and dyads move to the poles during _______ | Anaphase I
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| An inactive X chromosome is called a ______ | barr body
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| Includes only one division and replication of DNA at the end of each cycle | mitosis
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| Includes two divisions and replication of DNA at only the beginning of the cycle, not in between | meiosis
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| ____ introduces great genetic diversity into the offspring | fertilization
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| The period in between the first and second meiotic division is called ____ | interkinesis
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| Result of meiosis I | 2 haploid cells
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| Result of meiosis II | 4 haploid cells
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| Sister chromatids separate and become daughter chromosomes that move to the poles during ______ | anaphase II
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| Trisomy 21 is known as ____ | Down Syndrome
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| A XO female has __ | Turner syndrome
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| A XYY male has ___ | Klinefelter syndrome
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| The main purpose of meiosis is ____ | reproduction
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| The main purpose of mitosis is _____ | growth, development, and repair
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| True or False: The parent cells for mitosis and meiosis are diploid. | True
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| Following mitosis, daughter cells are ____ | diploid
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| Following meiosis, daughter cells are _____ | haploid
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| Following mitosis, the daughter cells are ___ to the parent cells | identical
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| Following meiosis, the daughter cells are ____ to the parent cells | different
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Created by:
Ungerer
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