Meiosis
Produces four haploid cells
What is meiosis?
He is known as the "father of genetics"
Who is Gregor Mendel?
This is a system of classification for viruses
What is the Baltimore System?
He is known as the father of evolution by natural selection
Who is Charles Darwin?
A species is a group of populations that can interbreed in nature and produce viable, fertile offspring
What is the biological species concept?
This is the total number of divisions that occur during meiosis
What is two?
Mendel discovered inheritance patterns using these garden plants
What are pea plants?
Viruses are considered this because they cannot reproduce on their own
What is nonliving?
This is all the alleles present in all individuals in a species
What is a gene pool?
States that members of the same species usually look alike
What is the morphological species concept?
Nuclear membrane reforms around four haploid nuclei in this stage
What is telophase II?
What is a phenotype?
HIV is this type of virus because it uses reverse transcriptase.
What is a retrovirus?
The random change in allele frequencies due to chance, especially in small populations
What is genetic drift?
Specific courtship rituals to attract mates are effective barriers, even between closely related species
These are the two major sources of genetic variation in meiosis
What is crossing over and independent assortment?
A dihybrid cross of a AaBb x AaBb yields this phenotypic ratio
What is 9:3:3:1?
These are weakened or inactivated viral particles used to stimulate immunity
What is a vaccine?
Nonrandom mating where individuals choose mates based on traits is known as this
What is sexual selection
A type of postzygotic barrier where hybrid offspring survive but cannot reproduce
What is hybrid sterility?
This term describes chromosomes that carry the same genes but possibly different alleles
What is homologous chromosomes?
A cross between a heterozygote and a homozygous recessive individual is called this
What is a test cross?
This is the cycle in which a virus immediately replicates and bursts its host cell.
What is the lytic cycle?
This type of speciation occurs without geographical separation
What is sympatric speciation?
Occurs when two groups of organisms speciate in response to each other
What is co-speciation?