Welcome to the Quiz!
This quiz contains 9 questions from a mix of 1 subtopics.
What does a dihybrid cross reveal?
the inheritance of two genes controlling separate characteristics
the inheritance of one gene controlling multiple characteristics
the inheritance of one gene with two alleles
the inheritance of two genes controlling the same characteristic
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What is the purpose of a dihybrid cross?
to determine if the genes are linked
to locate them on specific chromosomes
to calculate expected phenotypic ratios in subsequent generations
all of the above
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What is a true or pure breeding organism?
it has no traits being studied
it is heterozygous for the traits being studied
it is homozygous for the traits being studied
it is a hybrid for the traits being studied
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What are the reasons for deviations from expected ratios in dihybrid crosses?
(Select all that apply)
random fertilisation
linked genes
mitosis
multiple alleles
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What does the term 'linked genes' mean?
genes are on the same chromosome
genes are on different chromosomes
genes are on the same and different chromosomes
none of the above
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What is the expected phenotypic ratio in the F2 offspring in a dihybrid cross of two genes that are not linked?
2:2:2:2
1:1:1:1
9:3:3:1
8:2:2:1
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What does 'F1' refer to in the context of dihybrid crosses?
the first generation of offspring from the parental cross
the parental generation
the second generation of offspring from the parental cross
the third generation of offspring from the parental cross
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What do large sample sizes do in dihybrid crosses?
they decrease the chances of skewed ratios
they have no effect on the ratios
they increase the chances of skewed ratios
they make the ratios unpredictable
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What term is used to describe genes that are on the same chromosome?
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