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Genetics Quiz 7
Gurnick Genetics Quiz 7
| Question | Answer |
|---|---|
| genetics | study of genes and how they produce certain characteristics |
| gene | portion of the dna that code for a specific protein that determines a specific characteristic |
| locus | the specific location of a specific gene on a specific chromosome |
| allele | is a version of a gene. we get one allele from mom one from dad |
| how alleles are named | after the trait they code for. example a gene coding for protein A is called allele A or just A |
| genotype | is the list of all the alleles present in a diploid cell of the offspring |
| Autosomal | 1-22 codes for traits |
| sex linked | 23 codes for gender |
| heterozygous | when offspring inherits different versions of alleles ex Bb or bB |
| homozygous | when offspring inherits identical alleles from parents bb BB |
| phenotype | the outcome or result off the alleles that present |
| phenotype depends on | a. genotype (which alleles are present) b. how the alleles interact with each other |
| dominant genes | mask recessive genes |
| dominant vs recessive | one is not "better" than the other so to speak |
| genotype is the bb or BB | phenotype is the blue eyes of brown eyes |
| In heterozygous genotype Bb | the phenotype will reflect the dominant allele Bb= brown eyes |
| blue eyes are an example | homozygous recessive phenotype bb |
| Solving genetic problems | a. establish the genotype of of both parents b. cross the parents alleles using the pummetts square |
| genetic problems for x-linked chromosome | x-linked genetic disorder it is a mutant allele on #23 |
| why are females less prone to x-linked genetic disorders | because they have the back up x XX vs XY since the Y only codes for testosterone if the X is mutant the disorder will always present |
| example of a x-linked genetic disorder is hemophilia | hemophilia is a mutation that affects the clotting of blood |
| co-dominance | when two different alleles are equally dominant |
| blood types | red blood cells have specific id proteins on there surface |
| different blood types | A B AB O |
| recessive blood type | O |
| genotype for blood type a | AA AO |
| genotype for blood type b | BB BO |
| genotype for blood type o | OO |
| genotype for blood type ab | AB |
Created by:
beesgrl
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