Biology 120 Notes (Part 18) Continuing Genetics

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21 Terms

1
Testcross
________ is a process that is used to assess whether an individual displaying a dominant trait is heterozygous or homozygous.
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2
F1
Mendel allowed the ________ progeny to self- pollinate and the wrinkled seed trait reappeared in the F2 generation.
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3
Gregor Mendel
________ worked with pea varieties that differed in seven easily recognizable traits, this can also be referred to as an individuals phenotype (a trait that can be observed .)
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4
True breeding
________ is a term that describes how all of the offspring are of the same variety.
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5
Alleles
________ can be dominant or recessive.
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6
Genotype
________ refers to the two alleles an individual has for a specific trait.
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7
Genetic disorders
________ can be either autosomal or sex- linked.
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8
Mendels
________ pea population had two distinct phenotypes for each of the seven traits.
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9
Mendel
________ crossed plants with round seeds and plants with wrinkled seeds.
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10
A trait is a variant for a character, for example
brown
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11
We label the different generations of a cross as
P generation (parents), F1 generation (first filial generation), and F2 generation (second filial generation)
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12
The two possible results were
the F2 generation with two phenotypes (identical to the parents) or the F2 generation with four phenotypes
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13
Phenotype
refers to a trait that can be observable.
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14
trait
A _______ is a variant for a character
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15
monohybrid cross
A ________________ describes the mating between two parents that differ in only one trait.
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16
law of segregation
The __________________ describes how each individual has a pair of factors for each trait called alleles. The alleles segregate during gamete formation.
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17
The two possible results of a dihybrid cross are:
the F2 generation with two phenotypes (identical to the parents) or the F2 generation with four phenotypes.
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18
autosomal recessive disorders
To have an ________________, the individual who has it would have homozygous recessive alleles (aa).
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19
autosomal dominant disorder
The individual who has an _______________ would either have to have AA or Aa.
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20
Sex-linked disorders
_____________ affect the X and Y chromosomes.
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21
Autosomal disorders
____________ affect autosomes.
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