genetics ch 4

Created by cblewis 

Upgrade to
remove ads

22 terms

heredity

the passing of traits from parents to offspring

trait

a characteristic that an organism can pass on to its offspring through its genes.

genetics

the study of how traits are inherited through the actions of alleles

fertilization

process in sexual reproduction in which male and female reproductive cells join to form a new cell

dominant allele

an allele whose trait always shows up in the organism when the allele is present

punnet square

A chart that shows all the possible combinations of alleles that can result from a genetic cross

phenotype

what an organism looks like as a consequence of its genotype (two organisms with the same phenotype can have different genotypes)

codominance

a condition in which both alleles for a gene are fully expressed

meiosis

type of cell division where one body cell produces four gametes each containing half the number of chromosomes as a parents body cell

genes

sequence of DNA that codes for a protein and thus determines a trait

recessive allele

is hidden whenever the dominant allele is present

hybrid

offspring of crosses between parents with different traits

heterozygous

having two different alleles for a trait

homozygous

having two identical alleles for a trait

probability

a measure of how likely it is that some event will occur

amino acids

simple forms of protein normally used to build tissues or, under some conditions, burned for energy

alleles

different forms of a gene

DNA

deoxyribonucleic acid, the material that contains the information that determines inherited characteristics

messenger RNA

Type of RNA that carries genetic information from DNA in the nucleus to direct protein synthesis in the cytoplasm

mutation

change in a DNA sequence that affects genetic information

codon

a specific sequence of three adjacent bases on a strand of DNA or RNA that provides genetic code information for a particular amino acid

protein

a substance that is a necessary part of the cells of animals and plants

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set