Science Exam_
what does dna stand for
deoxyribonucleic acid
is the functional unit of heredity
gene
they provide instructions to make molecules called
proteins
they are made up of dna
proteins
dna is wrapped in proteins known as
histones
these wrapped dna molecules are now called
chromosomes
four bases in dna held by hydrogen bonds
Adenine
thymine
Guanine
Cytosine
states that adenine always pairs with thymine and cytosine always pairs with guanine
chargaff rule
who created the chargaff rule
Erwin chargaff
three laws under mendelian inheritance
law of dominance
allele
non-mendelian traits
states that when a purebred or homozygous dominant trait is crossed with a recessive trait
law of dominance
alternative form of a gene
allele
the place where thr allele is located from
locus
traits that do not follow Mendel's laws are called
non-mendelian traits
is when the homozygous trait is crossed with a recessive trait
incomplete dominance
is when the two different traits are both present in an individual
codominance
type of color blindness
monochromatism
dichromatism
anomalous trichomatism
a person is a _______ for a trait if he or she has it in his or her genes
carrier
another example of an X-linked recessive trait is
hemophilia
it is characterized by the inability of the blood to clot
hemophilia
what are the three alleles for the ABO human blood type
A
B
O
indicates th presence of the A antigen
A
indicates the absence of the B antigen
B
indicates the absence of any antigen
O
a color blindness that can see objects only in shades of gray
monochromatism
some cannot identify red, blue, or green
dichromatism
others still see colors but find it hard to determine shades of a certain color
anomalous trichromatism
an austrian monk, who discovered inheritance through his experiments with pea plants
Gregor Mendel
is known as the father of genetics because of this discovery
gregor mendel