Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
variation features clear, distinct categories, while variation is represented by a spectrum of phenotypes without distinct categories.
|
A larger standard deviation indicates:
more consistent values clustered around the mean
a smaller sample size
less consistent values widely spread around the mean
a higher mean value
|
Which of the following is an example of discontinuous variation?
weight of robins in a population
human blood types
height of trees in a woodland
milk yield among cows
|
Which of the following is an example of continuous variation?
the ability to roll the tongue in humans
presence or absence of horns in cattle
human blood types
variation in milk yield among cows
|
A normal distribution curve is typically:
flat and uniform
skewed to the right
bell-shaped and symmetrical around a central mean value
skewed to the left
|
Which type of variation is typically caused entirely by genes?
continuous variation
neither continuous nor discontinuous variation
both continuous and discontinuous variation
discontinuous variation
|
Describe how genetic factors can contribute to variation.
|
Which of the following is true about variation?
it can only arise due to genetic factors
it can only arise due to environmental factors
despite high similarity, each individual is distinct
it refers to the similarities observed among individuals within a population
|
Environmental influences can affect:
the genetic makeup of an organism
the number of chromosomes in an organism
the type of mutations an organism undergoes
the way an organism's genes are expressed
|
Which of the following is NOT a cause of genetic variation?
random mating
changes in environmental conditions
crossing over between chromatids
independent assortment of chromosomes
|
Polygenes are:
genes that have no effect on phenotype
genes that are only present in certain species
different genes at different loci that all contribute to a particular aspect of phenotype
genes that are only influenced by the environment
|
Which of the following factors can cause variations among individuals?
both genetic and environmental factors
genetic factors
neither genetic nor environmental factors
environmental factors
|
Which of the following is NOT a source of genetic variation?
mutations
meiosis
diet
random fertilisation
|