Sci 3\17\24 Flashcards
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Dna
Divided, form, 2
mitosis
made
meiosis
making
gene
male parent
sperm
female parent
egg
change in genes
mutation
Joining sex cells
fertilazation
2 parents
Sexual reproduction
One Parent
asexual reproduction
t/f with 23 pairs of chromosomes in the human body there are more than 8 mill combinations possible for every human cell
true
t/f dna is present in every cell of your body
true
T/F during anaphase in mitosis double stranded chromosomes separate
true
t\f In meiosis in haploid eggs and sperm cells
true
T/f In meiosis there are 3 divisions of a nucleus
false
The ______ chromosomes of each pair is called homeoglowsis chromosome
2
There are ____ pairs of chromosomes found in the human body.
23
Every species has a characteristic number of ____
chromosomes
In all sexualy reproducing chromosomes occur in _____
pairs
Sexual reproduction is the production of _____ through the process of meiosis and the fusion of sex cells.
offs[ring
In the process of mitosis cells divided in ______ steps
2
What is the final stage of mitosis
telophase
In the cells cycle most of life of any cell is spent in which faze
interphase
Which 2 scientists made a model of the DNA molecule
James watson and Francis Crick
When an organism is produced by only one parent it is called _____
asexual reproduction
Name the 2 ways asexual reproduction
regenerate and budding
What is the main difference between sexual reproduction and asexual reproduction?
in sexual reproduction you need a partner of a different gender in asexual reproduction you don’t
Name the 4 nitrogen bases.
Adenine, thymine, cytosine, guanine
What is the main difference between mitosis and meiosis?
Mitosis needs to identical cells divided and meiosis needs one
A: Type cell:body cell
sex cells
B: Beginning of cells:Diploid
Diploid
C# of cells produces:2
4
D End of cell: diploid
Haploid
E Number of chromosomes produced: 46
23
