How can we help?

You can also find more resources in our Help Center.

25 terms

Genetics

STUDY
PLAY
Allele
alternative form of a gene
Chromosome theory of inheritance
genralization that genes are locatedon chromosomes and that the behavior of chromosomes during meiosis and fertilization accounts for inheritance patterns
codominance
inheritance pattern in which a heterozygote expresses the distinct traits of both alleles
cross-fertilization
processby which sperm from one flower's pollen fertilizes the eggs in a flower of a different plant
dihybrid cross
mating of two organisms that differ intwo characteristics
dominant
descriptive pf an allele in a heterozygour individual that appears to be the only one affecting a trait
gamete
egg or sperm sex cell that contains a single set of chromosomes, one from each homologous pair
gene locus
specific location of a gene on a chromosome
genetic linkage
tendency for allels of genes on the same chromosomes to be inherited together
genetics
study of heredity
genotype
genetic makeup of an organism; an organism's combination of alleles
heterozygous
having different alleles for a gene
homozygous
having identical alleles for a gene
hybrid
offsoring of two differnt true-breeding varieties
intermediate inheritance
inheritance in which heterozygotes have a phenotype intermediate between the phnotypes of the two homozygotes
meiosis
process by which the nucleus and duplicated chromosomes of a cell divide and are evenly distributed, forming two daughter nuclei
monohybrid cross
mating of two organisms that differ in only one character
phenotype
obserable traits of an organism
polygenic inheritance
combined effect of two or more genes on a single character
Punnett square
diagram showing the probabilities of the possible outcomes of a genetic cross
purebred
Produce offspring with same form of trait as parent.
recessive
descriptive of an allele in a heterozygous individual that dies not appear to affect a trait
sex-linked gene
gene located on a sex chromosome
testcross
mating of an individual of unknown genotype but dominant phenotype with a hmozygous recessive individual
trait
variation of a particular inherited character