Post on 24-Feb-2016
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MEIOSIS REVIEW
Gametes
________ are sex cells.
Haploid
The daughter cells produced at the end of meiosis II are
considered- diploid or haploid?
Genetically DIFFERENT!
What is the genetic relationship of daughter cells
to each other in meiosis?
4
How many daughter cells are produced from
meiosis?
Egg cell
_______ is the female gamete.
Homologous chromosomes
___________ are the paired chromosomes that have genes for the same traits arranged in
the same order.
Fertilization
_________ is the process of joining gametes.
XY
What are the male sex chromosomes?
46
How many chromosomes do you have in your skin
cells?
Diploid
____________ is a cell containing 2 sets of
chromosomes.
NO!A dog has 78 chromosomes and is less complex than humans
Is the number of chromosomes related to the complexity of an
organism? WHY?
Meiosis
_______ is a two stage type of cell division that creates gametes.
23
At the end of meiosis II, how many (human) chromosomes
does each daughter cell have?
1
How many cell divisions occur in MITOSIS?
Diploid
The daughter cells produced at the end of MITOSIS are
considered- haploid or diploid?
46
What is the diploid number in humans?
Somatic cells
__________ are all cells other than egg or sperm cells.
23
How many chromosomes do you have in your egg
or sperm cells?
Genetically the SAME!
What is the genetic relationship of daughter cells
to each other in MITOSIS?
zygote
________ is the cell that is created when a sperm
fertilizes an egg.
XX
What are the female sex chromosomes?
Genetically DIFFERENT!
What is the genetic relationship of daughter cells
to parent cell in meiosis?
Haploid
_________ is a cell with only ONE set of chromosomes.
1. creates haploid gametes2. provides genetic variation
Why is meiosis significant? (2 reasons)
23Homologous Chromosomes
How many chromosomes do you get from your
mom?
Prophase I
During what stage of meiosis does crossing
over occur?
2
How many cell divisions occur in meiosis?
Crossing over
__________ occurs when nonsister chromatids of
homologous chromosome exchange genetic information.
Genetically the SAME!
What is the genetic relationship of daughter cells
to parent cell in MITOSIS?
46
At the end of meiosis I, how many (human) chromosomes
does each daughter cell have?
1. Crossing over – random swapping of DNA
2. Independent assortment of the homologous chromosomes – it is random to which side of the cell the chromosomes move to
EXPLAIN how meiosis provides genetic
variation? (2 ways)
2
How many daughter cells are produced from
MITOSIS?
23
What is the haploid number in humans?
Haploid
Are your sex cells diploid or haploid?
Diploid
Are your somatic cells diploid or haploid?
sperm
______ is the male gamete.