Genetics 1
what is the definition of Mitosis
A process where a single cell divides into two identical daughter cells
what is the definition of Genotypes
a genotype is the genes of an organism. They use TT, Tt, or tt.
what is the definition of natural selection
the process through which populations of living organisms adapt and change
whats the definition of artificial selection
where humans pick different traits they like in other animals or plants and bread them together.
what are fossils
the preserved remains of plants and animals whose bodies were buried in the ground.
whats the definition of Meiosis
a type of cell division that creates egg and sperm egg
what is the definition of phenotypes
it is the physical appearance of a trait in an organism.
Ex: brown eyes, blonde hair, dimples
whats the definition of migration
a seasonal movement of animals from one region to another.
whats the definition of GMO
an organism whose DNA has been altered using genetic engineering techniques, often to achieve a specific desired trait.
what are the types of fossils
petrification, replacement, permineralization, molds and cast, carbonization, fossil resin, tar and ice, and trace fossil.
what is a nucleus
the structure in a cell that contains the chromosomes
what are punnet squares
it is a diagram used in genetics to predict the possible genotypes of offspring results from a cross between two individual.
whats the definition of mutation
a change in DNA sequence of an organism
whats the definition of Advantages and Disadvantages
Advantages-opportunity or means specially favorable to success.
Disadvantages-an unfavorable circumctances
what are fossils used for?
give us a useful insight into the history of life on earth.
what is the difference between an animal cell and a plant cell
a plant cell have a cell wall, chloroplasts, and large central vacuole, while animal cells lack theses structure.
what is Homozygous and Heterozygous
Homozygous:are the same alleles (TT)
Heterozygous: different alleles (Tt)
whats the definition of genetic drift
the change in frequency of an existing gene variant in the population due to random chance
what is the definition of selective breading
the process where humans choose organisms with desirable traits to breed, amining to produce offspring with those same traits.
Relative- their age in comparison to each other, determining which is older or younger rather then the exact age.
Absolute- dating attempts to determine the numerical age of an rock or fossil
what are chromosome
a structure inside the nucleus of a cell. it is made of proteins and DNA organized by genes. Each cell normally contains 23 pairs of chromosomes.
What is Dominant and Recessive traits
Dominant traits:those which are more likely to be inherited due to their stronger allele expression.
Recessive traits: a trait that must be contributed by both parents in order to appear in the offspring.
whats the definition of structural and behavioral adaptations.
structural- is the physical features of an organism that help it survive and reproduce in its environment.
Behavioral- an actor or behavior that an organism takes to survive in there environment.
what is the definition of gene therapy
to treat or prevent diseases by manipulating an individuals genes.
whats the definition of law of superposition
undisturbed rock layers, the oldest layer of rock is at the bottom and the younger layer is at the top.