DNA, Genes & Chromosomes - AGHAMAZING GUROdanrogayan.weebly.com/.../2_dna_genes_chromosomes.pdfgenes...
Transcript of DNA, Genes & Chromosomes - AGHAMAZING GUROdanrogayan.weebly.com/.../2_dna_genes_chromosomes.pdfgenes...
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DNA, Genes & Chromosomes
DANILO V. ROGAYAN JR.Faculty, Department of Natural Sciences
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We are all
UNIQUE!
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What are
responsible for the
different traits that
make us unique as
a person?
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DNA
GENES
CHROMOSOM
ES
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What
is
DNA?
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DNA• Deoxyribonucleic Acid
• molecules are large and complex
• carry the genetic code that
determines the characteristics of a
living thing
• located in the cell nucleus
• small amount of DNA can also be
found in the mitochondria
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GENE
• basic physical and functional
unit of heredity
• segments of DNA, act as
instructions to make molecules
called proteins.
• There are about 20,000 to 25,000
genes in our cells.
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Chromosomes• They carry all of the information
used to help a cell grow, thrive,
and reproduce.
• made up of DNA
• found inside the
nucleus of the cell
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• Chromosomes are not always visible.
They usually sit around uncoiled and as
loose strands called
• When it is time for the cell to reproduce,
they
chromatin
very tightly
WRAP&CONDENSE
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OBSERVE AND EXPLAIN
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How many
chromosomes
do humans
have?
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Organisms have
different number of
chromosomes
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Humans have 46
chromosomes
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Peas have 12 chromosomes
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Dogs have 48 chromosomes
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A crayfish has 200
chromosomes
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The number of chromosomes
is NOT related to the
intelligence or complexity of the
creature.
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The sad part is..
• There are genetic disorders
caused by abnormalities in
our chromosome number or
structure.
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How should we treat
people with genetic
disorders?
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Lakô hã salamát!Maraming salamat!