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WorksheetsUT2 Review
Total questions: 45
Worksheet time: 52mins
Where do adaptations come from?
The individual organism decides to adapt
Mutations that give an organism an advantage in its environment
Genetic recombination during meiosis
Both mutations and genetic recombination are sources of adaptation
Which best describes the role of mutations in natural selection?
Mutations help an organism to better survive in their environment
An organism may acquire a helpful mutation by interacting with the environment
A mutation may result in a beneficial trait that makes an organism more likely to survive and reproduce
Organisms with certain traits are more likely to win competitions for mutations
Mutations are important because they bring about
death of the organism in which they develop
genetic variation needed for a population to evolve
benefits for the individual, not for the population
changes in genotype, but not phenotype
What is a gene?
sections of DNA
sections of UNA
a trait
an adaptive trait
Where are genes located?
on the cell
in the mitochondria
on chromosomes
on an organism
Individuals undergo evolution.
True
False
Which of the following is NOT an example of natural selection?
People selectively breeding hamsters for size.
Insect populations developing resistance to certain pesticides.
Bacteria becoming resistant to antibiotics.
Male birds of certain species inheriting colorful feathers that are more attractive to females.
A flood drowns a large portion of an insect population, with only a few random individuals surviving. This is an example of ______.
genetic drift
adaptation
natural selection
Cells of organisms must go through cell division for?
growth
repair of damaged cells
replacement of dying cells.
All of these
DNA is replicated during ______ of the cell cycle.
Gap 1
Synthesis (S phase)
Gap 2
Gap 0
In prophase of mitosis, chromosomes
form and the nuclear envelope disappears.
are pulled toward opposite ends of the cell.
chromosomes line up along the equator of the cell
chromosomes begin to decondense and the two new nuclei begin to form.
In anaphase of mitosis, chromosomes
form and the nuclear envelope disappears.
are pulled toward opposite ends of the cell.
chromosomes line up along the equator of the cell
chromosomes begin to decondense and the two new nuclei begin to form.
In metaphase of mitosis, chromosomes
form and the nuclear envelope disappears.
are pulled toward opposite ends of the cell.
chromosomes line up along the equator of the cell
chromosomes begin to decondense and the two new nuclei begin to form.
In telophase of mitosis, chromosomes
form and the nuclear envelope disappears.
are pulled toward opposite ends of the cell.
chromosomes line up along the equator of the cell
chromosomes begin to decondense and the two new nuclei begin to form.
In garden pea plant, long stem is dominant over short stem. How many percent will be short stem garden pea plants that may appear in the first filial generation if both parents are heterozygous for the given trait?
25% short stem pea plant
50% short stem pea plant
75% short stem pea plant
100% short stem pea plant
ATG TGA CAG
