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BIO - CH 9
vocab
| Question | Answer |
|---|---|
| heredity | the passsing of traits from parents to their young |
| genetics | branch of biology that studies heredity |
| self-pollination | process in which pollen falls from the anther to the stigma of the same flower of between flowers of the same plant |
| cross-pollination | transfer of pollen from the flower of one plant to the flower of another plant |
| pure bread | belonging to a group of organisms that can produce offspring having only one form of a trait in each generation |
| trait | characteristic that a living thing can pass on to its young |
| hybrid | organism with two different alleles for a particular trait, heterzygous |
| gene | segment of DNA that codes for a particular protein |
| allele | one of a number of different forms of the same gene for a specific trait |
| dominace | principle that recognizes that some alleles are dominant and some are recessive |
| dominat | form of a gene that is expressed even if present with a contrasting recessive allele |
| recessive | description of a form of a gene(allele) that is only expressed in the homozygous state |
| segregation | separation in genetics |
| Punnett Square | chart showing the possible combinations of genes in the offspring cross |
| gamete | specialized reproductive cell involved in sexual reproduction |
| phenotype | physical characteristic of an organism |
| genotype | genetic makeup of an organism |
| homeozygous | organism that has two identical alleles for a particular trait |
| heterzygous | organism that has two different alleles for the same trait and is said to be hybid for that particular trait |
| independent assortment | process by which genes segregate independantly |
| probability | likelihood that a particular event will occur |
| test cross | cross between an organism of unknown genotype and an organism that is homozygous recessive for a pariticular trait |
| homologous | description of chromosomes that occur in pairs |
| diploid | description of a cell that contains a double set of chromosomes, one from each parent |
| haploid | containing a singles set of chromosomes |
| meiosis | process that produces haploid gametes from diploid cells |
| crossing-over | process by which homologous chromosomes exchange portions of their chromatids during meiosis |
Created by:
shelleyra
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