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biological and chemical methods to change the arrangement of DNA that makes up a gene
how do alleles separate during meiosis
alleles for each trait also separate into different sex cells. Every sex cell has 1 allele for each trait
what is the difference between genetics and heredity
heredity is the passing of traits from parents to offspring. Genetics is the study of heredity
the three principles of heredity and am I able to write them down p. 132, table 2
1. traits are controlled by alleles on chromosomes
2. an allele's effect is dominant or recessive
3. when a pair of chromosomes separates during meiosis, the different allels for a trait move into separate sex cells
what is a mutation, what can cause it
changes or errors in the DNA when it is being copies during cell division; certain chemicals, Xrays, and radioactive materials can cause mutations
what is a recessive genetic disorder, how can it be inherited, what is an example, how does it occur
a genetic disorder caused by recessive genes
each parent passes a recessive allele to the child
they occur when both parents have a recessive allele responsible for the disorder
what is a sex-linked disorder, how can it be inherited, what is an example, how does it occur
a condition that results from inheriting sex-linked genes; females when each X chromosomes has the recessive gene; male when his X chromosome has the recessive allele; color blindness
how is gender determined what do the chromosomes for a male look like, for a female
by the sperm passing either an X or a Y to the egg; female = XX male = XY
what is gene therapy, what particles are used, what does it do
gene transfer - first normal DNA or RNA is replaced in a virus. Then the virus delivers the normal DNA or RNA to target cells. It might help genetic disorders such as cystic fibrosis
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