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28 Cards in this Set
- Front
- Back
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who was the "father" of genetics |
Gregor Mendel |
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What is the probability that the offspring of a homozygous dominant cross between _______ generations with opposing traits. |
1.0 (or 1) |
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The first filial (F1) generation is the designation for Mendels original "True-breeding" strains of plants? |
P and F2 |
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which of the following is the designation for Mendel's original True- breeding strains of plants? |
P |
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The passing of traits from parents to offspring is called |
heredity |
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A genetic trait that is always expressed in the offspring is called what? |
Dominant trait |
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If one parent is recessive and the other is heterozygous, the probability of recessive offspring is? |
.5 |
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To explain distribution of multiple traits during gamete formation, Mendel proposed the law of what? |
independent assortment |
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the phenotype of an organism _____. |
reflects traits that are actually expressed |
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If an individual has two recessive alleles for the same trait, the individual is said to be ____. |
homozygous |
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Tallness (T) is dominant over shortness (t) in pea plants. Which of the following represents the genotype of a pea plant that is homozygous for shortness? |
tt (two little t's) |
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How many different phenotypes can be produced by crossing heterozygous parents with co-dominant alleles? |
3 |
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a red flower is crossed with a yellow flower resulting in all orange flowers. This condition is called what? |
incomplete dominance |
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The expected genotype ratio resulting from a homozygous recessive x heterozygous monohybrid cross is? |
1:1 ratio |
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In a dihybrid cross, what fraction of the offspring would we expect to be homozygous recessive for both traits when both parents are heterozygous for both traits? |
1/16 |
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what is the expected genotype ratio resulting from a heterozygous x heterozygous monohybrid cross? |
1:2:1 ratio |
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the expected phenotype ratio resulting from a homozygous dominant x heterozygous monohybrid cross is? |
1:0 ratio |
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an organism that has inherited two of the same alleles of a gene from its parents is called what? |
homozygous |
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in pea plants, yellow seeds are dominant over green seeds. What would be the expected genotype ratio in a cross between a plant with green seeds and a plant that is heterozygous for seed color? |
1:1 ratio |
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what fraction of the offspring resulting from a heterozygous x heterozygous dihybrid cross would we expect to express both dominant traits? |
9/16 |
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a cross of two individuals for a single contrasting trait is called a ______ cross. |
monohybrid |
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blood type is inherited as a combination of two alleles from three possible, to form how many genotypes? |
6 |
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if one parent is heterozygous for type 'A' blood and the other is heterozygous for type 'B' blood, then their children could have what blood type? |
they could have" 'A' 'AB' 'B' 'O' |
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when 2 orange snapdragon flowers are crossed, we would expect the resulting phenotypes to be _____ |
one red two orange one yellow |
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human blood type alleles (A,B,O) can combine to form how many phenotypes? |
4 |
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crossing two pink snapdragon flowers will likely result in ______ red snapdragons. |
25% |
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since eye color traits are carried on the 'X' chromosome in fruit flies, crossing a heterozygous red eyed female with a red eyed male will result in _______ of males having white eyes. |
50% |
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given the facts from question #27 the genotype of a white eyed female fruit fly would be ______. |
XrXr |
