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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Mendel's Principle of Dominance
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Principle of Dominance - when 2 forms of same gene are present, the dominant allele is expressed
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What is Pleiotropy?
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one gene affects more than one phenotype
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C_ color
cc no color |
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In a test cross with what genotype do you cross the unknown:
a. WW b. Ww c. ww |
c. ww
in order to determine a missing genotype ALWAYS cross with a homozygous recessive |
homo
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What is Epistatis?? Give an example.
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one gene masks the expression of another gene
- 3 phenotypes rather than 4 ex. mammal coat color |
polygenetic
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What is an example of a phenotype?
a. height b. Ww c. chicken comb d. blue |
d. phenotype is how you LOOK
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I'm so beautiful I should sing solo.
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Affected males (sex-linked) pass the gene to ________ of their daughters and _______ of their sons.
a. all/none b. none/all c. all/all d. none/none |
a. because males have only 1 X chromosome they MUST pass it on to all of his daughters, his sons get his y, which is not traced to sex-linked infections.
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this question is really easy, think sex chromosomes!!
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What are the 3 primary patterns of inheritance?
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1) autosomal recessive
2) autosomal dominant 3) sex-linked (X-chromosomal) |
a
a s |
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_______ allele(s) make up ________ gene(s). (give amount)
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2, 1
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small numbers
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In Dan's family, dumbo ears are dominant. What would be the resulting genotypes and phenotypes of the following cross:
Woman whose ears are heterozygous crossed with a man whose ears are homozygous Dominant what is the resulting ratio homo:hetero |
all dumbo ears
TT, Tt 1homo:1hetero |
Tt x TT
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Mendel's Principle of Segregation
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Principle of Segregation - in meiosis, 2 alleles separate so that each gamete receives only one form of the gene
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crossover frequency equation
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# if recombinants/total # of offspring x 100
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it's a percent
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The **farther/less** apart genes are, the **greater/smaller** the probability that crossing over will occur between them
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farther/smaller
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does it make sense?
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Complete linkage is common.
True or False |
False, Complete Linkage is RARE
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what are recombinants??
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offspring that result whose parents' phenotypes are both different and also different from the offspring in question
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Mendel's Principle of Independent Assortment
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Principle of Independent Assortment - each trait is inherited independent of other traits (chance)
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