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WCCVETTECH - Genetic
Genetics - Term 1
| term | Definition |
|---|---|
| Allele | 1 of 2 or more different genes that coode for similar proteins at the same locus on the chromosome |
| Asexual reproduction | mitosis in the absence of gametes; the offspring are identical to the parent |
| Autosome | any of the chromosomes other than the sex defending chromosomes |
| Chromosome | linear thread of DNA found in the nucleus carrying the genetic code in the form of genes |
| Congenital | devlop anomaly in which environ influences during the develop caused a mutation |
| Diploid # | normal # of chromosomes for a particular species |
| Dominant | an allele that is expressed in the phenotype even if the individual is heterzygous |
| Gene | basic unit of heredity |
| Genotype | genetic makeup of an individual |
| Haploid # | half the normal # of chromosome; found in the gametes |
| heredity | passing on of traits from parents to offspring |
| heterozygous | possesing different alleles for a trait |
| homozygous | possesing identical alleles for a trait |
| Hybrid | offspring of distantly related or different species |
| incomplete dominance | phenotypic blending of 2 alleles |
| Locus | position on the chromosome where the alleles are located |
| Phenotype | outward apperance of an individual |
| progeny | offspring |
| Punnett square | graph used to calc the % of offspring with particular genotypes |
| recessive | allele that is not expressed in the phenotype unless the individual is homozygous |
| Sexual repro | creation of offspring from gametes |
| Trait | distinguishing charac of an individual |
| Mendel | Gregor; monk |
| Somatic Cells | body |
| Gametes | haploid - sex cells, containg 1 chromosome of each type |
| BB | Simple Dominance; homozygous |
| Bb | Simple dominance; heterozygous |
| bb | simple dominance; homozygous; recessive |
| Sex Linked | X Y = Y does not contain all the same genes |
| Codominance | both alleles appear equally in the phenotype |
| Lethal Genes | A gene whose expression results in the death of the individual expressing it. |
| Incomplete Dominance | Phenotype that is intermdiate between 2 alleles; Red X Y = Pink |
| RR x R'R' | R = Red; R' = white 100% pink |
| Dihybrid Cross | A cross between two individuals identically heterozygous at two loci for example, AaBb/AaBb. |
| complementary | 2 genes that are only expressed when both are present |
| Epistatis | (epi = above); one gene masks the express of a second gene at a seperate locus |
| Polygenic Inheritance | traits that are created by the interation of multiple different genes |
| Line breeding | mating w/in a certain faily and maintaing the relationship |
| Out-crossing | unrelated animals (mutt) |
Created by:
wccvettech
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