Meiosis and producing genetically diverse offspring

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Meiosis and producing genetically diverse
offspring Discussions start(ed) this week.
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This sideclose your eyes
This side keepyour eyes open
Try to remember what you are about to hear.
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This sideclose your eyes
This side keepyour eyes open
Try to remember what you are about to hear.
It's about a kite.
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A newspaper is better than a magazine, and on a
seashore is a better place than a street. At
first it is better to run than to walk. Also you
may have to try several times. It takes some
skill but its easy to learn. Even young
children can enjoy it. Once successful,
complications are minimal. Birds seldom get too
close. One needs lots of room. Rain soaks in
very fast. Too many people doing the same thing
can also cause problems. If there are not
complications, it can be very peaceful. A rock
will serve as an anchor. If things break loose
from it, however, you will not get a second
chance.
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Fig 17.3
Protein
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Fig 13.5
Meiosis producing gametes
For life to exist, the information (genes) must
be passed on.
Mitosis producing more cells
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Mitosis a DNA Perspective
Fig12.4
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Sister Chromatids are replicated DNA
Fig12.4
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Mitosis plays a role in

• Growth and Development
• Repair and Turnover of Cells
• Reproduction
• Asexual

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The Cell Cycle
Fig 12.5
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start of mitosis
Fig 12.6
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Fig 13.5
Meiosis producing gametes
For life to exist, the information (genes) must
be passed on.
Mitosis producing more cells
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Allele for low express (short)
Diploid chromosomes
Allele for black hair
Allele for sickle cell Hb
Gene for growth hormone
Gene for hemoglobin
Gene for hair color
Allele for black hair
Allele for high express (tall)
Allele for normal Hb
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Fig 13.3
Each pair of chromosomes is comprised of a
paternal and maternal chromosome
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sister chromatids replicated DNA
(chromosomes) tetrad pair of sister chromatids
Fig 13.4
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Fig 13.7
X 23 in humans
Meiosis splits apart the pairs of chromosomes.
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haploid
X 23 in humans
X 23 in humans
diploid
X 23 in humans
Inheritance The interaction between genes
inherited from Mom and Dad.
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Fig 12.2
X 23 in humans
Meiosis splits apart the pairs of chromosomes.
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Fig 13.12
Crossing-over (aka Recombination)
DNA cut and religated
DNA cut and religated
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Fig 13.12
Crossing-over Proteins in the cell cut and
religate the DNA, increasing the genetic
diversity in gametes.
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Fig 13.12
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Fig 13.11
Independent Assortment (aka Random Assortment)
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Fig 13.11
Independent Assortment
2 possibilities for each pair, for 2 pairs 22 4
combinations
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Fig 13.11
Independent Assortment
2 possibilities for each pair, for 23 pairs 223
8,388,608 combinations
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Meiosis and producing genetically diverse
offspring Discussions start(ed) this week.