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| 1087083141 | Heredity | The biological process whereby genetic factors are transmitted from one generation to the next | 0 | |
| 1087083142 | Genetics | Scientific study of heredity | 1 | |
| 1087083143 | Gregor Mendel | "Father of Genetics" | 2 | |
| 1087083144 | Character | A heritable feature that varies among individuals | 3 | |
| 1087083145 | Trait | Each variant of a character | 4 | |
| 1087083146 | Hybrids | The offspring of crosses between parents with different traits | 5 | |
| 1087083147 | Genetic Cross | Cross-fertilization of two different varieties of an organism or two different species; hybridization | 6 | |
| 1087083148 | P generation | Parental generation, the first two individuals that mate in a genetic cross | 7 | |
| 1087083149 | F1 generation | The first generation of offspring obtained from an experimental cross of two organisms | 8 | |
| 1087083150 | F2 generation | After the self-pollenization of the F1 generation, this is produced. | 9 | |
| 1087083151 | Self fertilization | Fertilization in which both egg and pollen come from the same plant | 10 | |
| 1087083152 | Cross-fertalization | Fertilization of one plant by pollen from a different plant | 11 | |
| 1087083153 | True-breeding | Term used to describe organisms that produce offspring identical to themselves if allowed to self-pollinate | 12 | |
| 1087083154 | Monohybrid cross | Mating of two organisms that differ in only one character | 13 | |
| 1087083155 | Alleles | Different forms of a gene | 14 | |
| 1087083156 | Homozygous | An organism that has two identical alleles for the same trait or gene | 15 | |
| 1087083157 | Heterozygous | An organism that has two different alleles for the same trait or gene | 16 | |
| 1087083158 | Dominant allele | An allele whose trait always shows up in the organism when the allele is present | 17 | |
| 1087083159 | Recessive allele | An allele that is masked when a dominant allele is present | 18 | |
| 1087083160 | Law of segregation | During gamete formation the alleles for each gene separate from each other so that each gamete only carries one allele for each gene | 19 | |
| 1087083161 | Punnett square | A chart that shows all the possible combinations of alleles that can result from a genetic cross | 20 | |
| 1087083162 | Phenotype | An organism's physical appearance, or visible traits. | 21 | |
| 1087083163 | Genotype | An organism's genetic makeup | 22 | |
| 1087083164 | Dihybrid cross | A cross between two individuals, concentrating on two definable traits | 23 | |
| 1087126717 | Law of independent assortment | Genes for different characters (and on different chromosomes) are inherited independently of one another | 24 | |
| 1087126718 | Testcross | Breeding an organism of unknown genotype with a recessive homozygote | 25 | |
| 1087126719 | Rule of multiplication | A statistical rule stating that the probability of two independent events occuring together is the product of their individual probabilities. | 26 | |
| 1087126720 | Rule of addition | A statistical rule stating that the probability of either of two indpendent (and mutually exclusive) events ocuring is the sum of their individual probabilities minus the probability of them both occuring together. | 27 | |
| 1087126721 | Wild-type traits | Traits prevailing in nature | 28 | |
| 1087126722 | Pedigree | A chart or "family tree" that tracks which members of a family have a particular trait | 29 | |
| 1087126723 | Cystic Fibrosis | A genetic disorder that occurs in people with two copies of a certain recessive allele; characterized by an excessive secretion of mucus and consequent vulnerability to infection; fatal if untreated. | 30 | |
| 1087126724 | Inbreeding | Matings between close blood relatives | 31 | |
| 1087126725 | Achondroplasia | A form of dwarfism in which the head and torso develop normally, but the arms and legs are short | 32 | |
| 1087126726 | Huntington's disease | A human genetic disease caused by a dominant allele; characterized by uncontrollable body movements and degeneration of the nervous system; usually fatal 10 to 20 years after the onset of symptoms. | 33 | |
| 1087126727 | Amniocentesis | A technicque by which a small amount of the fluid that surrounds a developing baby is removed; the fluid is annalyzed to determine wheather the baby will have a genetic disorder. | 34 | |
| 1087126728 | Chorionic villus sampling (CVS) | Test in which a sample of placental tissue is taken from a woman's abdomen and placental tissue is aspirated thru a needle; the tissue, formed from the zygote reflects the genetic makeup of the fetus | 35 | |
| 1087126729 | Ultrasound imaging | A technique for examining a fetus in the uterus. High-frequency sound waves echoing off the fetus are used to produce an image of the fetus. | 36 | |
| 1087126730 | Complete dominance | A relationship in which one allele is completely dominant over another | 37 | |
| 1087126731 | Incomplete dominance | A pattern of inheritance in which two alleles, inherited from the parents, are neither dominant nor recessive. The resulting offspring have a phenotype that is a blending of the parental traits. | 38 | |
| 1087126732 | ABO blood group | 3 alleles of a single gene that produce the 4 different blood types | 39 | |
| 1087126733 | Codominant | A heterozygote in which both alleles are fully expressed | 40 | |
| 1087126734 | Pleiotropy | A single gene having multiple effects on an individuals phenotype | 41 | |
| 1087126735 | Sickle-cell disease | A human genetic disease caused by a recessive allele that results in the substitution of a single amino acid in the hemoglobin protein; characterized by deformed red blood cells that can lead to numerous symptoms. | 42 | |
| 1087126736 | Polygenic inheritance | An additive effect of two or more genes on a single phenotypic character. | 43 | |
| 1087126737 | Chromosome theory of inheritance | Generalization that genes are located on chromosomes and that the behavior of chromosomes during meiosis and fertilization accounts for inheritance patterns | 44 | |
| 1088487480 | Linked genes | Genes located close together on the same chromosomes; tend to be inherited together. Typically don't follow Mendel's law of independent assortment | 45 | |
| 1088487481 | Recombination frequency | The percentage of recombinants. | 46 | |
| 1088487482 | Linkage map | Genetic map that shows the location of genes on a chromosome | 47 | |
| 1088487483 | Sex chromosomes | Chromosomes that determine the sex of an individual; YX = Male and XX = Female | 48 | |
| 1088487484 | Sex-linked gene | A gene located on a sex chromosome | 49 | |
| 1088487485 | Hemophilia | A human genetic disease caused by a sex-linked recessive allele, characterized by excessive bleeding following injury. | 50 | |
| 1088487486 | Red-green colorblindness | A sex-linked recessive allele, not able to distinguish red from green color | 51 | |
| 1088487487 | Duchenne muscular dystrophy | A human genetic disease caused by a sex-linked recessive allele; characterized by progressive weakening and a loss of muscle tissue. | 52 |
