9109880
Description
Question 1
Question
If two events are [blank_start]independent[blank_end] of each other, we use the product rule, and [blank_start]multiply[blank_end] their probabilities.
Answer
-
independent
-
multiply
Question 2
Question
What is the probability of getting an AaBbcc offspring from the cross of Aa BB Cc x Aa Bb cc?
Answer
-
50%
-
25%
-
12.5%
Question 3
Question
If you observed a 2:1 ratio for a gene in offspring, what could you assume?
Answer
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One allele combination is lethal and so is never observed.
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One allele combination never leads to a phenotype.
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One allele combination is very rare.
Question 4
Question
Greater polymorphism in a population can be advantageous for survival and evolution.
Answer
- True
- False
Question 5
Question
Choose the incorrect statement about Incomplete Dominance.
Answer
-
Both alleles appear to be expressed equally by all cells, showing an intermediate phenotype which is neither.
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A cross between two F1 individuals with a blended appearance of alleles will produce offspring in a 1:2:1 ratio, where 50% of the offspring have the phenotype of a blended appearance and the other 50% display single alleles.
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It proves the blending inheritance theory.
Question 6
Question
Which statement best describes co-dominance?
Answer
-
Both alleles are expressed on the phenotype at the same time.
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Neither alleles appear to be expressed on the phenotype, but instead an intermediate between them is seen.
Question 7
Question
The ABO blood antigen system is a good example of:
Answer
-
incomplete dominance
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co-dominance
Question 8
Question
Epistasis describes the situation where one gene [blank_start]affects[blank_end] the action of another. Hence, if the gene to produce one enzyme in a [blank_start]metabolic pathway[blank_end] is damaged or ineffective, the next enzyme and gene in the chain may be perfectly [blank_start]function[blank_end] but will never produce an end product because their precursor is dysfunctional. The second gene is said to be under [blank_start]epistatic control[blank_end] of the first.
Answer
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affects
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metabolic pathway
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functional
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epistatic control
Question 9
Question
A phenotype controlled by many genes which have an additive effect is known as a [blank_start]_______[blank_end] trait, and example being [blank_start]______[blank_end].
Answer
-
polymorphic
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polygenic
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skin colour, weight, or height etc.
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eye colour, hair colour, etc.
Question 10
Question
What is pleiotropy?
Answer
-
One gene having many phenotypic affects.
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One gene affecting many other genes.
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Many genes affecting the phenotype in a summative way.
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