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Genetics, Evolution & Ecosystems
Patterns of Inheritance
Variation: Phenotype
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Created by
Imogen Stevens
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Cards (26)
What are the observable characteristics of an organism called?
Phenotype
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What is phenotypic variation?
Difference in
phenotypes
within the same species
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What can explain phenotypic variation in some cases?
Genetic factors
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How many alleles are involved in the ABO blood group system?
Three
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What causes the different blood groups in humans?
Different
alleles
for the
ABO gene
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How can environmental factors affect phenotypic variation?
By influencing
growth
and development
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What happens to clones of plants with the same DNA in different environments?
They grow to
different heights
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What is the formula that represents the relationship between phenotype, genotype, and environment?
Phenotype
=
Genotype
+ Environment
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How can genes affect an organism's phenotype?
By having varying effects on
characteristics
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How many alleles do diploid organisms inherit for each gene?
Two
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What does the F8 gene code for?
Blood-clotting protein
Factor VIII
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What condition can result from different alleles at the F8 gene locus?
Haemophilia
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What environmental factors can impact an organism's phenotype?
Sunlight
, nutrients, water, temperature,
oxygen
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How does a lack of nutrients affect plants with a tall genotype?
They cannot
grow
to their
full
potential
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Can phenotypic variation caused by environmental factors be inherited?
No
, it cannot be
inherited
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What happens to Drosophila melanogaster larvae on a diet of silver salts?
They develop a
yellow
color
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What is etiolation in plants?
Growth in the dark leading to
abnormal
features
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Why is genetic variation inherited while environmental variation is not?
Genetic variation affects DNA of
gametes
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What is the impact of sunlight hours on organisms?
It
affects
their
growth
and
development
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How does temperature range influence phenotypic variation?
It affects
growth and development processes
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What role does oxygen level play in an organism's phenotype?
It influences
metabolic processes
and growth
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How can changes in environmental factors affect organisms?
They can alter
growth
and
development
outcomes
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What happens to plants grown in the dark?
They develop long
stems
and curled
leaves
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What is the significance of the phrase "variation in phenotype due to genetics is inherited"?
It means genetic changes affect
gametes
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What is the effect of magnesium deficiency on plants?
They
become
yellow
instead
of
green
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Why is it important to understand the impact of environmental factors on phenotype?
To comprehend how
organisms
adapt and survive
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