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Sexual Reproduction.

Chapter 9 Sexual Reproduction Review Activity (Adv. Bio)

QuestionAnswer
Allows two individuals can create offspring that are genetically different from themselves and from each other Meiosis
In humans, more than ___ different genetic combinations are possible from the mating of just two individuals 70 trillion
Meiosis results in ___ daughter cells Genetically diverse
Meiosis results in ___ (#) daughter cells Four
Meiosis that helps to produce sperm Spermatogenesis
Meiosis that helps to produce eggs Oogenesis
In females, the process of producing eggs has started before she's even born and ends around age 50, a time called ___ Menopause
In males, sperm production is ___ Unlimited
In body cells, the chromosomes occur in pairs called ___ Homologous chromosomes
Homologous chromosomes are each composed of two ___ Sister chromatids
Type of nuclear division that is important in sexual reproduction Meiosis
Type of nuclear division that is important to growth, repair and development Mitosis
Uniting of sperm and egg Fertilization
Body cells Autosomes
XY Sex chromosomes
Picture of a full set of chromosomes Karyotype
Female XX
Male XY
Sex chromosomes are the only chromosomes that ___ (in males) Appear different
(2n) chromosome number Diploid
(n) chromosome number Haploid
Humans have ___ pairs of chromosomes Twenty-three
Members of a chromosome pair Homologous chromosomes
___ contain copies of the same genes arranged in the same order Homologous chromosomes
Alternate forms of a gene Allele
All the reproductive events that occur from one generation to another Life cycle
In meiosis, following duplication chromosomes, the parent cell undergoes ___ Two divisions
In plants, meiosis still reduces the number of chromosomes in half, but instead of producing gametes, it produces a ___ Spore
The cells that result as a product of mitosis OR meiosis are referred to as ___ cells Daughter
During prophase I, homologous chromosomes line up side by side and form a ___ Tetrad
When homologous chromosomes are in ___, the nonsister chromatids exchange genetic material Synapsis
A ___ is composed of two sister chromatids Dyad
Meiosis helps keep the chromosome number constant by producing ___ daughter cells that become gametes Haploid
Haploid reproductive cell Gamete
The number of ___ in a cell equals the number of chromosomes Centromeres
Period in between meiosis I and meiosis II in which NO DNA replication occurs Interkinesis
Four stages of cell division: prophase, metaphase, ___ and telophase Anaphase
During, ___ daughter chromosomes consisting of one chromatid each move to the poles Anaphase II
Dyads align at the spindle equator Metaphase II
Tetrads align at the spindle equator Metaphase I
There are ___ pairs of chromosomes within a given skin cell Twenty-three
Within a given neuron, there are __ pair(s) of sex chromosomes. One
Homologous chromosomes carry genes for __ Traits
Homologous chromosomes may carry genes for the same traits but the ___ present may be different on each Allele
Process by which one cell cleaves into another Cytokinesis
Crossing over occurs when homologous chromosomes are in ___ Synapsis
After crossing over, sister chromatids are no longer Identical
Meiosis I and Meiosis II differ from one another, and from mitosis, in the way chromosomes ___ during metaphase Align
Meiosis and mitosis are both examples of __ Cell division
Meiosis occurs only at certain times during the reproductive life cycle and only in certain ___ Tissues
Mitosis occurs throughout a lifetime and in ____ tissues All
XO Turner syndrome
XXY Klinefelter Syndrome
Trisomy 21 Down syndrome
"Dakota's Pride" was a documentary regarding Down syndrome
A person with Trisomy X has how any barr bodies? Two
Because of ___, gametes either lack chromosomes or have an extra Nondisjunction
Down Syndrome is an example of ___ Nondisjunction
Most cases of nondisjunction occur by means of the ___ Egg
Created by: SavannahElkins
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