biology discussion notes thursday 01/08/2015. goals for the day 1.be able to say the names of...
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Biology Discussion Notes
Thursday 01/08/2015
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Goals for the day1. Be able to say the names of everyone in our
class2. Be able to define what haploid & diploid mean
and know the numbers for humans
3. Be able to calculate haploid number given diploid number & vice versa
4. Know the haploid & diploid number for HUMANS
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Question of the Day THUR 1/08
What is the goal of Meiosis?
(You may use your reading sheet)
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Meiosis is a process that reduces the amount of chromosomes in a cell to half
the original amount
Why would you want to reduce chromosomes by half?
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Where do you get your chromosomes (DNA) from?
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Human Egg and Sperm cells have
23 chromosomes in them.
How many chromosomes are in
human egg and sperm cells?
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Haploid – a half set of chromosomes (only found in sex cells)
Diploid – a full set of chromosomes (found in all body cells, except sex
cells- Body Cells AKA somatic cells)
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Gamete
Skin Cell
Egg
Somatic Cell
Sperm
Sex Cell
Haploid or Diploid?
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How many chromosomes do humans have in their cells?
How many chromosomes would be in a human diploid cell?
How many chromosomes would be in a human haploid cell?
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If a Dragon’s wing cell has 50 chromosomes in
it then... 2n=_______
n=______
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NAME GAME• First Round: Say your own name
when you get the ball – must throw it to someone who has not had it yet.
• Second Round: Say the name of the person you are throwing it to, if you don’t know a name, you should……
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Reading guide
• Work on Reading guide
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Species of the Day 1/8• Rough-legged Hawk
– Buteo lagopus
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Species of the Day 1/8
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Species of the Day 1/8• Rough-legged Hawk
– Buteo lagopus
If the egg cell of this hawk had 30 chromosomes, how many chromosomes would you find in its SOMATIC cells?