Science flahscards week 6 Flashcards
Flashcards week 6 (31 cards)
What does The Nucleus consist of?
membrane bound control center of
cell containing X-shaped structures called
chromosomes.
What does the Chromosomes consist of?
X-shaped structure
consisting of a single DNA molecule.
What is a DNA Molecule?
consisting of genes, the
“code of life”
What does the organism consist of?
½ genes mom + ½ genes dad
What is Interphase?
chromosomes can not be seen;
doubling of chromosomes; nuclear membrane
present; 99% of cell life.
What is Prophase?
spindle fibers form; chromosomes seen.
What is Metaphase?
chromosomes line up in the Middle,no nuclear membrane.
What is Anaphase?
chromosomes move Apart (Away).
What is Telophase?
Two joined cells; two nuclear
membranes form.
What is the definiton of Cytokinesis ?
Two separated daughter cells form.
What is Asexual Reproduction?
parent/daughter cells identical appearance.
What is cancer?
certain DNA mutations cause cells to divide in an uncontrolled way.
What cause cancer?
1.Chemicals
2.Radiation
3.Hereditary
What are the three treatments for cancer?
1.Surgery
2.Radiation
3.Chemotherapy
How do you prevent cancer?
avoid smoking, eat healthy diet,
protect skin from bright sunlight. Vitamins may help.
What is a punnet square?
is a technique used to predict what percentage of offspring (children) will be likely to
have a particular trait (physical feature).
What is a trait?
physical (behavioral) feature of organism.
What does dominant mean?
It means that it shows.
What is recessive?
often hidden(weak)
Whats an offspring?
A child.
Whats a gene?
allele (dad) + allele (mom)
Whats an allele?
(part of gene)
what is a purebred?
Purebred (homozygous)= same alleles (gene);
What is a hybrid?
mixture of alleles
