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Ch 9-Adv Bio

Meiosis Review

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