9109880
Descripción
Pregunta 1
Pregunta
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.
Respuesta
-
independent
-
multiply
Pregunta 2
Pregunta
What is the probability of getting an AaBbcc offspring from the cross of Aa BB Cc x Aa Bb cc?
Respuesta
-
50%
-
25%
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12.5%
Pregunta 3
Pregunta
If you observed a 2:1 ratio for a gene in offspring, what could you assume?
Respuesta
-
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.
Pregunta 4
Pregunta
Greater polymorphism in a population can be advantageous for survival and evolution.
Respuesta
- True
- False
Pregunta 5
Pregunta
Choose the incorrect statement about Incomplete Dominance.
Respuesta
-
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.
Pregunta 6
Pregunta
Which statement best describes co-dominance?
Respuesta
-
Both alleles are expressed on the phenotype at the same time.
-
Neither alleles appear to be expressed on the phenotype, but instead an intermediate between them is seen.
Pregunta 7
Pregunta
The ABO blood antigen system is a good example of:
Respuesta
-
incomplete dominance
-
co-dominance
Pregunta 8
Pregunta
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.
Respuesta
-
affects
-
metabolic pathway
-
functional
-
epistatic control
Pregunta 9
Pregunta
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].
Respuesta
-
polymorphic
-
polygenic
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skin colour, weight, or height etc.
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eye colour, hair colour, etc.
Pregunta 10
Pregunta
What is pleiotropy?
Respuesta
-
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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