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Biology Unit 2 Roqui
Biology Unit 2 Terms
| Question | Answer |
|---|---|
| a characteristic or feature of an organism. | trait |
| is doxyribonucleic acid, a chemical found in cells that carries gentic info. | DNA |
| control heredity, the transfer of characteristics from parents to offspring, and determine the gentic traits that will be expressed. | genes |
| are structures composed of genes that are linked togerhter: they come in pairs | chromosomes |
| is a form of asexual reproduction that is needed for the growth and repair fo cells | mitosis |
| chromosomes shorten and become visivle, then the nuclear membrane begins to deteriorate. | prophase |
| the chromosomes line up in the center of the cell | metaphase |
| the chromosomes separate in half, are pulled away from the center, and move ot the opposite ends of the cells | anaphase |
| the chromosomes lengthen, each group reaches one of hte centrioles, and the spindle fibers disintegrate | telophase |
| is the process that produces sex cells | meiosis |
| chromosomes shorten and vecome visible, hte nuclear membrane deteriorates, and the spindle fibers appear. | prophase I |
| the homologous chromosomes line up along the center of the cell and spindle fisbers attach to them. | metapahse I |
| the homoloyous chromosomes separate. these chromosomes move towards opposet sides of the cell | anaphase I |
| in the final pase of meisisI hte cell divides in to two cells. each of the two cells has one double stranded chromosome forom each of the homologous chromosome pairs. | telophase I |
| what is the order of the stages in meiosis | prophase I metaphase I anapahse I telophase I |
| what is the order of the stages in mitosis | prophase metaphase anaphase telophase |
| what is used to express dominant traits | capital case letters |
| what is used to express receseve traits | lower case letters |
| an individual will have a pair of these alleles such as Rr, RR, or rr, representing his or her | genotype |
| the actual trait or characteristic that is expressed is called the | phenotpe |
| ... are used to find the probabiliy that an offspring will express a certain trait | alleles and genotypes |
| the probability that an offspring will express a certanin trait are placed in a chart called a | punnet square |
| what goes on top of a punnet square | male parent's alleles |
| what goes on the left side of a punnet square | female parent's alleles |
| is when two alleles in a genotype are both fully expressed in the phenotype and shows no dominance over each other | co-dominance |
| is when two alleles mix to form a phenotype that is a combination of the two traits. | incomplete dominance |
| traits that are controlled by interactions between more than one pair of genes | polygenic traits |
| are located on the same chromosome, so they will be inherited together. | linked genes |
| are carried on the X or Y chromosomes, which are the chromosomes that determine sex | sex-linked genes |
| is used to predict different combinations of genotypes | di-hybrid cross |
Created by:
coreyanderson