Flashcards 4
what is Nucleus?
membrane bound control center of
cell containing X-shaped structures called
chromosomes. Each chromosome consists
of two chromatids held together by a
centromere.
what is Chromosome?
X-shaped structure
consisting of a single DNA molecule.
what is the DNA Molecule?
consisting of genes, the
“code of life”
what is an Organism?
½ genes mom + ½ genes dad
what is Cancer?
abnormal cell division; uncontrolled
mitosis; certain DNA mutations cause cells to
divide in an uncontrolled way.
what is TREATMENT?
surgery, radiation, drugs,
immunotherapy.
what is PREVENTION?
avoid smoking, eat healthy diet,
protect skin from bright sunlight. Vitamins may
help.
what is a Gene?
allele (dad) + allele (mom)
what is Allele (part of gene)?
T or t
what is Purebred (homozygous)?
same alleles (gene);
TT, tt
what is Hybrid (heterozygous)?
mixture of alleles; Tt
what is Punnett Squares?
is a technique used to predict what
percentage of offspring (children) will be likely to
have a particular trait (physical feature).
what is Trait?
physical (behavioral) feature of organism
what is Dominant ?
capital and shows itself (strong); Tt, TT
what is Recessive?
lowercase and often hidden (weak)
except when all alleles (genes) are recessive; tt
