Traits
What word could be used to describe the following genotype?
AA
Homozygous dominant.
What is the term used to describe the genetic makeup of an organism?
Genotype.
What is an adaptation?
A characteristic that helps an organism survive in its environment
What is extinction?
WHen a species dies out completely.
Gregor Mendel is known as the father of genetics primarily because he?
Established the basic principles of heredity through pea plant experiments
What is a dominant trait/allele?
A trait that is always expressed even if paired with a recessive trait.
What is genetic variability?
The different forms of genes in a population
How do adaptations develop in a population?
Through natural selection over generations
Which factor does NOT contribute to evolution?
Nautral Selection, Individual Wishes To Change, Mutations
Individual Wishes To Change
What causes mutations?
Various factors including environmental conditions and errors in DNA replication
In order for a recessive allele or trait to show what must be passed on?
Both parents must pass on the recessive trait.
What happens when recessive alleles are expressed?
Both copies were passed on and the recessive trait shows, example blue eyes
How does natural selection affect genetic variability?
It can either increase or decrease variability
What role does population size play in evolution?
It affects the rate of genetic drift
What role do fossils play in understanding evolution?
They provide evidence of changes over time
What type of letter represents a dominant trait?
A capital letter.
How does genetic variation benefit a population?
It increases survival chances in changing environments
How does artificial selection differ from natural selection?
Humans deliberately choose desired traits
What defines a species?
A group of genetically similar organisms
What does homozygous dominant mean in terms of genotype?
It has two of the same capital letters.
What type of letter represents a recessive trait?
A lowercase letter.
What is the relationship between alleles and genes?
Alleles are different forms of the same gene
What is an example that we discussed in our unit of natural selection happening? (Hint, it happened in the 1950's)
Moths and coal pollution.
Why do scientists study embryos in the early stages of development?
To determine if organisms have similarities at somepoint in their life and to determine if they came from a common ancestor.
What does the word heterzygous mean for genotypes?
There are two different letters, a capital and a lowercase letter.