What is the principle of dominance as described by Mendel?

Genetics: Alleles and Traits

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Biology, Science, Chemistry
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9th - 12th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A recessive allele masks the effect of a dominant allele.
A gene that is always expressed in the phenotype.
A gene that is never expressed in the phenotype.
A dominant allele masks the effect of a recessive allele.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of incomplete dominance, what is the expected phenotype when a red carnation is crossed with a white carnation?
Red carnation
White carnation
Pink carnation
Spotted carnation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes co-dominance?
One allele is completely dominant over the other.
Both alleles contribute equally to the phenotype.
Neither allele is expressed in the phenotype.
The phenotype is a blend of both alleles.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a characteristic of multiple alleles?
All alleles are expressed equally in the phenotype.
A gene can have more than two alleles in a population.
Only two alleles exist for each gene in a population.
An individual can have more than two alleles for a gene.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do multiple alleles contribute to genetic diversity?
By ensuring all individuals have the same phenotype.
By allowing for a wide range of phenotypes in a population.
By limiting the number of possible phenotypes.
By reducing the number of alleles in a population.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is pleiotropy?
A single gene affecting multiple traits.
Multiple genes affecting a single trait.
A gene that does not affect any trait.
A gene that only affects one trait.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which disorder is used as an example of pleiotropy in the podcast?
Huntington's disease
Phenylketonuria (PKU)
Sickle cell anemia
Cystic fibrosis
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