10/18 Flashcards
multifactor:
multiple factors go into determining how a gene is expressed. ex: coat color
T/F: sometimes environmental factors can be applied to multi factor genes
True
True Polygenic conditions __ mean genes that you see multiple effects of
dont
true polygenetic conditions means
quantitive conditions (genetics)
an example of Meristic
how many scales are on a lizard
an example of Mensural
the height or weight of an individual
Meristic is something which is __
countable
Mensural is something which is __
measurable
A bell curve is due to ___ ___ ___
additive genetic variation
the intermediate form produces the __ point in the bell curve
tallest
T/F: do both Meristic and Mensural fall under quantitive genetics?
True
__ __ helped discover that a lot of yields found in plants and animals fall in additive genetic variation
quantitive genetics
the most common form produced in quantitative genetics is the __ form
intermediate
additive genetic variation is that 1 alleles adds 1 unit of ___
variation
how can one calculate the phenotype of an individual
add up units of variation within the individual. 1 unit of variation is added by each allele
most yields (milk yield) tends to have which type of genetics associated with it? quantitative or additive
additive
Penetrance:
% of the population that shows the phenotype associated with the genotype
an example of penetrance: a group of 50 individuals all have the genotype for freckles, but they do not all express the same number of freckles. why?
because of penetrance
if most all in the population do show the phenotype for its correlating gene, this is known as __ Penetrance
high
expressivity:
the level of expression
an example of expressivity: a group of people that all have the genotype for the same disease, but their symptoms vary in how dramatically they are expressed. why?
because of expressivity differences
expressivity __ included in genetic testing
isn’t
genetic tests allow for ___ medicine
personalized
complex trait/rare varient
unique genetic makeup with a unique (rare) genotype
complex trait/ common variant
everyone has the same mutation type with basically the same genetic coding for a specific disease
you can see genetic variation in symptoms because there are several __ that work together to produce various symptoms
genes
allelic variation = different combinations = lots of genetic variation = same disease but the __ ranges from mild to severe
expression
regulatory genes can increase/ decrease the __ of the gene which they regulate
expression
