Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chpt_9_Genetics
Vocabulary for Chapter 9 of Holt Modern Biology: Fundamentals of Genetics
| Question | Answer |
|---|---|
| Genetics | The field of biology devoted to understanding how characteristics are transmitted from parents to offspring |
| Heredity | The transmission of characteristics from parents to offspring |
| Trait | A genetically determined variant of a characteristic |
| Pollination | When pollen grains produced in the male reproductive parts of a flower, called the anthers, are transferred to the female reproductive parts of a flower, called the stigma |
| Self-pollination | Occurs when pollen is transferred from the anthers of a flower to the stigma either of that flower or another flower on the same plant |
| Cross-pollination | Occurs between flowers of two different plants |
| True-breeding | Plants that are pure for a trait and always produce offspring with that trait when they self-pollinate |
| P generation | The true-breeding parents of a cross |
| F1 generation | The offspring of the parent generation and the first filial generation |
| F2 generation | The second filial generation of a cross |
| Dominant | The factor that masks or dominates the other factor in a pair |
| Recessive | The factor that is masked in the F1 but reappears in the F2 generation |
| Law of Segregation | States that a single pair of factors is segregated, or separated, during the formation of gametes |
| Law of Independent Assortment | States that two or more pairs of factors separate independently of one another during the formation of gametes |
| Molecular genetics | The study of the structure and function of chromosomes and genes |
| Genotype | The alleles that the organism inherits from its parents |
| Phenotype | An organism's appearance |
| Homozygous | Occurs when both alleles of an organism are alike |
| Heterozygous | Occurs the two alleles of an organism are diferent |
| Probability | The likelihood that a specific event will occur |
| Monohybrid cross | A cross in which only one characteristic is tracked |
| Punnett square | A diagram that aids scientists in predicting the probable distribution of inherited traits in the offspring |
| Genotypic ratio | The ratio of the genotypes that appear in offspring |
| Phenotypic ratio | The ratio of the phenotypes that appear in the offspring |
| Complete dominance | A relationship in which one allele is completely dominant over another |
| Incomplete dominance | A relationship in which the heterozygote phenotype is intermediate between the dominant phenotype and the recessive phenotype |
| Codominance | Occurs when both alleles for a gene are expressed in a heterozygous offspring |
| Dihybrid cross | A cross in which two characteristics are tracked |
| Testcross | A cross in which an individual of unknown genotype is crossed with a homozygous recessive individual |
Created by:
SavioScience
Popular Biology sets