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Bio Ch 14
Terms in this set (36)
Alternative versions of genes account for variation in inherited characters.
Tests performed to know whether the developing fetus has Tay-Sachs disease.
Although phenotypically normal with regard to the disorder, heterozygotes may transmit the recessive allele to their offspring
A heritable feature that varies among individuals,such as flower color.
Chorionic Villus Sampling(CVS)
Physician inserts a narrow tube thorugh the cervix into the uterus and suction out a tiny sample of tissue from the placenta. Screening for fetus
The two alleles both affect the phenotype in separate, distinguishable ways.
The Phenotypes of the heterozygote and the dominant homozygote are indistinguishable.
Too much mucus membrabe
Crossing two true-breeding pea varieties that differ in both of these characters
Determined the organism's appearance
a gene at one locus alters the phonotypic expression of a gene at a second locus
Hybrid offspring of P Generation(first filial generation, the word filial from the Latin word for "Son")
F1 Hybrids(f1 generation) is allowed to self-pollinate(produce second filial generation)
An organism that has two different alleles for a gene(Mm)
Pair of identical alleles for a character (KK,kk)
Degenerative disease of the nervous system
Cross-pollination, two contrasting; This mating, or crossing, of two true-breeding parents.
The F1 hybrids have a phenotype somewhere between those of the parental varieties.
Law of independent assortment
states that each pair of alleles segregates independently of each other pair of alleles during gamete formation.
Law of Segregation
states that the two alleles for a heritable character segregate(separate) during gamete formation and end up in different gametes.
All the F1 progeny produced in his crosses of true-breeding parents, meaning that they were heterozygous for one character.
Factors, both genetic and environmental, collectively influence phenotype.
Norm of Reaction
describes the pattern of phenotypic expression of a single genotype across a range of environments.
Referred to true-breeding parents(parental generation)
Organism's appearance or observable traits
Most genes have multiple phenotypic effects, genes give everyone differences
Handy diagrammatic device for predicting the allele composition of offspring from a cross between individuals of known as genetic makeup. (SS,Ss,ss)
Indicates polygeni inheritance, an additive effecct of two or more genes on a single phenotypic character
has no noticeable effect on the organism's appearance
Abnormally shaped blood cells
Inherited disorder which make brain cells of a child not metabolize certain lipids.
Breeding an organism of unknown genotype with recessive homozygote, it can reveal the genotype of that organism.
Each variant for a character, such as purple or white color for flowers.
Each resulting zygote then developed into a plant embryo encased in a seed had produced only the same variety as the parent plant.
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