A) Directional Selection In directional selection is distribution over time. What has happened to the mouse fur colour over generations? What selective pressure might cause this change? B) Stabilizing Selection In stabilizing selection, the phenotype is and extreme phenotypes are over time. What selective pressure might cause mouse fur phenotypes to change this way? C) Disruptive Selection In disruptive selection of the phenotype are for survival over time. This results in the loss of the intermediate phenotype. This might eventually form What happened to the intermediate phenotype of mouse fur colour over time? of the phenotype resulting in a shift in the phenotype
A) Directional Selection In directional selection is distribution over time. What has happened to the mouse fur colour over generations? What selective pressure might cause this change? B) Stabilizing Selection In stabilizing selection, the phenotype is and extreme phenotypes are over time. What selective pressure might cause mouse fur phenotypes to change this way? C) Disruptive Selection In disruptive selection of the phenotype are for survival over time. This results in the loss of the intermediate phenotype. This might eventually form What happened to the intermediate phenotype of mouse fur colour over time? of the phenotype resulting in a shift in the phenotype
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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I need help with Directional, Stabilizing and Disruptive Selection pls
Transcribed Image Text:Microevolution - Genetic Diversity
and Natural Selection - V2
Microevolution is the
that results from
occur over a
number of
caused by changes in
changes occur to help populations better
Microevolution results in adaptations as a result of
the fittest offspring.
Alleles and Gene Pools
The physical traits or
depend on
CHROMOSOME-segment of
ONA that contains genes
the
or
Species with more
genetic
HOMOLOGOUS CHROMOSOMES
a matched pair of chromosomes
one from each parent
are more
likely to survive when there are
challenging
GENE-a section of DNA on a
chromosome that has
instructions to make a protein
You inherit a copy of each
gene from each parent
in the
environment like climate change.
A gene pool describes
of
ALLELE a variation of a gene
For example the eye colour
protein has alleles for blue
grey, brown and green
in a
population.
Natural Selection
Natural selection is the process by which individuals with
traits that make them better suited for
their environmert are more likely to
and
. There are 4 types of natural selection:
A) Directional Selection
In directional selection
of the phenotype
Is
resulting in a shift in the phenotype
distribution over time.
What has happened to the mouse fur colour over
generations?
What selective pressure might cause this change?
B) Stabilizing Selection
In stabilizing selection, the
phenotype is
are
over time.
What selective pressure might cause mouse fur
phenotypes to change this way?
C) Disruptive Selection
In disruptive selection
of the phenotype
are
for survival over time. This results
in the loss of the intermediate phenotype. This might
eventually form
What happened to the intermediate phenotype of mouse
fur colour over time?
D) Sexual Selection
changes that
and extreme phenotypes
Microevolution is
in a population. These
to their environment.
Genetics Reviewed
of
Gene for wing length-
homozygous
Gene for wing colour-
heterozygous
Note: Moth wing colours more complicated tha
fr
Fur colour thange
over time
Onge Exte
T
Original
Fur colour change
over time
Ev
-Original
population
✰✰✰✰✰
Phenotypes (ur color
Fur colour change
over time
Original Evolved
opulation population
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