9109880
Beschreibung
Frage 1
Frage
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.
Antworten
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independent
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multiply
Frage 2
Frage
What is the probability of getting an AaBbcc offspring from the cross of Aa BB Cc x Aa Bb cc?
Antworten
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50%
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25%
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12.5%
Frage 3
Frage
If you observed a 2:1 ratio for a gene in offspring, what could you assume?
Antworten
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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.
Frage 4
Frage
Greater polymorphism in a population can be advantageous for survival and evolution.
Antworten
- True
- False
Frage 5
Frage
Choose the incorrect statement about Incomplete Dominance.
Antworten
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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.
Frage 6
Frage
Which statement best describes co-dominance?
Antworten
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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.
Frage 7
Frage
The ABO blood antigen system is a good example of:
Antworten
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incomplete dominance
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co-dominance
Frage 8
Frage
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.
Antworten
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affects
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metabolic pathway
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functional
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epistatic control
Frage 9
Frage
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].
Antworten
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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.
Frage 10
Frage
What is pleiotropy?
Antworten
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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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