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28 Cards in this Set
- Front
- Back
What is the difference between a monohybrid cross and dihybrid cross?
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A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid only one
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What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants?
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Traits are inherited in discrete units, and are not the result of blending.
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How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?
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8
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WHich of the following about law segregation is false?
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It is a method that can be used to determine the number of chromosomes in a plant
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Mendel's obersevation of the segregation of alleles in gamete formation has its basis in which of the following phases of cell division?
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Anaphase I of meosis
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A 1:2:1 phenotypic ratio in the F2 generation of a monohybrid cross is a sign of complete dominance.
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Incomplete dominance
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The relationship between genes S and N is an example of
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epistasis
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Which of the following is a possible phenotype for the father?
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B positive
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Which describes the ABO blood group system?
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Multiple Alles
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Cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this?
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Pleiotropy
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Which of the following is an example of polygenic inheritance?
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Skin pigmentation in humans
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Hydrangea plants of the same genotype are planted in a large flower garden. Some of the plants produce blue flowers and others pink flowers. This can be best explained by which of the following?
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Environmental factors such as soil PH
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Huntington's disease is a dominant condition with late age of one set in humans. If one parents has the disease, what is the probability that his or her child will have the disease?
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1/2
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A woman has six sons. The chance her next child will be a daughter is
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1/2
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People with sickle cell trait
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All of the above
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Phenylketonuria (PKU) is a recessive human disorder in which an individual cannot appropriately metabolize a particular amino acid. This amino acid is not otherwise produced by humans. Therefore the most efficient and effective treatment is which of the following?
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Regulate the diet of the affected persons to severely limit the uptake of the amino acid
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An organism's appearance or observable trait
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Phenotype
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Determines phenotype in a heterozygote
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Dominant Allele
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A cross between an indivdual with an unknown genotype and homozygous recessive individual
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Testcross
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Having two identical alleles for a gene
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Homozygous
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The genetic makeup of an individual
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Genotype
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An alternative version of a gene
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Allele
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Has no effect on phenotype in a heterozygote
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Recessive allele
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A variant for a character
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Trait
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Having two different alleles for a gene
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Heterozygous
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A heritable unit that determines a character and can exist in different forms
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Gene
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A cross between individuals heterozygous for a single character
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Monohybrid Cross
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A heritable feature that varies among individuals
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Character
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