Download DEOXYRIBOSE NUCLEIC ACID

________________
Taking another look at DNA
#1
DNA… A Quick Review
#2
What are chromosomes?
Chromosomes are
________________
________________
.
#3
Structure of Chromosomes
Sometimes you may
see chromosomes
in ________.
#4
Chromosomes come in
________________________
Half the chromosomes
come from the
____________.
The other matching
half comes from the
____________.
#5
What are genes?
Genes are _______________
________________________
________________________
________________________
Gene for eye color
proteins
Gene for hair color
proteins
#6
Different organisms have
different ___________________.
Fruit fly
DNA
Human DNA
8 chromosomes
(__________)
46
chromosomes
(__________)
#7
All organisms have a certain number of
chromosomes in their _____________
cells called the diploid number.
__________ (2n)= _____ set
of chromosomes (DNA)
Organism
Diploid Number
Human
46 (23 pairs)
Corn
20 (10 pairs)
Dog
78 (39 pairs)
Chicken
78 (39 pairs)
Crayfish
200 (100 pairs)
#8
All organisms only have half the number
of chromosomes in their
_________________ called the haploid
chromosome number.
__________ (1n)= _____ set
of chromosomes (DNA)
Organism
Diploid Number
Haploid Number
Human
46
23
Corn
20
10
Dog
78
39
Chicken
78
39
Crayfish
200
200
#9
Imagine a diploid human
sperm and egg cell coming
together…
Egg (female
sex cell) from
Mom
46
46
Sperm (male
sex cell) from
Dad
Baby’s Body
Cell
#10
Now, imagine a haploid sperm
and egg cell coming
together…
Egg (female
gamete) from
Mom
23
23
Sperm (male
gamete) from
Dad
Baby’s Body
Cell
#11
Keep these numbers in mind:
Humans have
___
chromosomes,
AKA ___
______________
_____________.
#12