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7. Genetics
DDMS 7th Grade - Chap. 15, sec. 1 & 2
Question | Answer |
---|---|
The chromosomes that carry genes to determine whether a person will be male for female, as well as genes for other traits | Sex Chromosomes |
A gene that is carried on the X or the Y Chromosome | Sex-linked gene |
A person who carries a recessive gene for a trait, but does not show the trait | Carrier |
When two different alleles are present, and both traits occur together | Codominance |
If you have an allele for type A blood, and an allele for type o blood, what blood type will you have? | Type A |
If you have an allele for type B blood, and an allele for type A blood, what blood type will you have? | Type AB |
Who is more likely to have a sex-linked trait? | Males |
If a male has a sex-linked trait, which parent did he get that trait from? | His Mother |
Can a male be a carrier for a sex linked trait? Why? | No; if a male has even one recessive allele, he will have the trait. |
Why can a sex-linked traits sometimes occur if a person has only one recessive allele? | If there is no dominant allele with it, the trait will occur |
What else, other than genetics, can determine a person’s characteristics? | The environment that someone lives in can determine how certain characteristics develop |
An abnormal characteristic that a person inherits through genes or chromosomes | Genetic Disorder |
A chart that tracks which family members have a particular trait | Pedigree |
When two different alleles are present, the result is a blend of the two traits. | Incomplete Dominance |