Another exception is "
codominance", where both
alleles are active and both
traits are
expressed; for example, both red and white
petals.
Codominance is also apparent in
human blood types.
Full article >>>multiple allelesone of three or more alternative forms of allelic series that all map to a specific
locusSource: Jenkins, John B. 1990.
Human Genetics, 2nd Edition. New York: Harper & Row ...
Full article >>>alleles whose summed effect is that of lethality for example, four
alleles each of which would be lethal 25% of the time (or to 25% of their bearers), are equivalent to one lethal
allele.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Full article >>>Codominant alleles occur when rather than
expressing an intermediate
phenotype, the
heterozygotes
express both
homozygous phenotypes. An example is in
human ABO blood types, the
heterozygote AB type manufactures
antibodies to both A and B types.
Full article >>>Alleles in genetic crosses are usually indicated by capital and lower case letters with
dominant alleles designated by capitals and
recessive alleles designated by lower case letters.
Full article >>>Alleles: Alternative forms of a genetic
characteristic.
Amino acids: Small
molecules that form the building blocks of
proteins.
Autosome: All chro mosomes except those involved in sex determination.
Full article >>>alleles: different forms of the same
gene.
alveoli: microscopic air sacs that are surrounded by a rich network of blood
vessels in mammalian
lungs that function in gas exchange; the air sacs are at the end of the
bronchioles.
Full article >>>Alleles Alternative forms of a
gene. For example, the mutants putA601 and putA736 each have a different
mutation in the putA
gene.
Full article >>>Alleles alternate forms for genes
(allelo = one another parallel)
Allelopathy when
plants secrete chemicals to retard/inhibit the growth of other
plants
(allelo = one another parallel; pathos = disease suffering) ...
Full article >>>Alleles and
LociAn
allele is a
gene that has more than one form. Each of the forms is referred to as an
allele. For example, the
gene for red
flowers and the
gene for white
flowers are two different
alleles.
Full article >>>Alleles can increase or decrease in frequency due to drift. The average expected change in
allele frequency is zero, since increasing or decreasing in frequency is equally probable.
Full article >>>-
Alleles-
Heterozygous-
Homozygous- P generation
Definition: A
plant, that when self-fertilized, only produces
offspring with the same
traits. The
alleles for these type of
plants are
homozygous.
Full article >>>Both
alleles encode a PKG, a
protein kinase (an
enzyme that attaches
phosphate groups to target
proteins) that is activated by the "
second messenger" cyclic GMP (cGMP) [More].
Full article >>>When the
alleles of a
gene do not differ with regard to
fitness, on average the number of
carriers in one generation is proportional to the number of
carriers in the last.
Full article >>>multiple alleles A condition in which more than two
alleles exist for a given
trait.
multiple fission
Asexual reproduction by the splitting of a
cell or
organism into many
cells or
organisms. See schizogony.
Full article >>>Different
alleles of a
gene may perturb molecular aspects ofthese networked biosystems.
Full article >>>All of the
alleles available among the reproductive members of a
population from which
gametes can be drawn.
Related Terms:
Allele ...
Full article >>>2e-
Inheritance of
alleles from both parents
2g - Predicting
genotype of
offspring from parents.
Demonstrate how an
organism's
genotype depends on the
genotype of its parents.
Full article >>>The loss or gain of
alleles from a
population due to the e
migration or im
migration of fertile individuals, or the
transfer of
gametes, between
populations.
gene poolThe total aggregate of genes in a
population at any one time.
Full article >>>(See
Electrophoresis.)
Alleles. Alternate forms of a
gene or
DNA sequence, which occur on either of two
homologous chromosomes in a
diploid organism. (See
DNA polymorphism.) Alternative m
RNA splicing.
Full article >>>Dominant --
alleles that determine the
phenotype displayed in a
heterozygote with another (
recessive)
allele. Down syndrome -- a type of mental
deficiency due to
trisomy (three copies) of
autosome 21, a
translocation of 21 or
mosaicism.
Full article >>>Gene flow: the
transfer of genes (actually,
alleles) from one
population to another.
Full article >>>The three common apolipo
protein E (ApoE)
alleles differentially contribute to the risk of Alzheimer's disease (AD).
Full article >>>Genes determining Greek or Roman status are
alleles of the same
locus, the MAT
locus.
Diploid cells resulting from the
mating of Romans and Greeks do not make any pheromones or pheromone
receptors.
Full article >>>In cases of
maternal effect, the
transmission pattern of the
alleles is the same as in standard
Mendelian
genetics but the
action of the
gene occurs a generation later.
Full article >>>: The property possessed by some
alleles of determining the
phenotype for any particular
gene by masking the effects of the other
allele (when
heterozygous). Thus,
homozygosityor
heterozygosity ...
Full article >>>Polygenic disorders: Genetic disorders resulting from the combined
action of
alleles of more than one
gene (e.g.,
heart disease, diabetes, and some
cancers).
Full article >>>Different
alleles produce
variation in inherited
characteristics such as hair color or blood type. In an individual, one form of the
allele (the
dominant one) may be
expressed more than another form (the
recessive one).
Full article >>>Haplotype The combination of
alleles of different genes that are present in an individual.
Hybridization The interbreeding of
animals or
plants of different
species.
Full article >>>Genotype. The genetic makeup of an
organism, with respect to a given genetic
locus, the
alleles it carries
Genus. (plural: genera) The level of the
taxonomic hierarchy above the
species but below the
family level ...
Full article >>>The situation in which a
heterozygote shows the phenotypic effects of both
alleles fully & equally, (eg blood group
antigens).
Full article >>>during
anaphase 1 of
meiosis, producing
gametes containing only one
allele of each
gene. Such an occurrence is the physical mechanism underlying the first law of
Mendelian
genetics and is particularly important when the two separated
alleles are ...
Full article >>>Used in detection of
genetic disease alleles etc.
RT-PCR PCR amplification from an
RNA template. The first step involves synthesis of a single
strand of c
DNA on the
RNA template using
reverse transcriptase.
Full article >>>'"/>