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Genetics Vocab
Transposable elements, genetic variegation, linkage/mapping
22
Biology
Undergraduate 3
11/18/2010

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Term
A decrease in the genetic material on one particular chromosome.
Definition
Deletion (deficiency)
Term
A change in the position of genetic material within a chromosome without altering the amount of genetic material carried by the chromosome.
Definition
Inversion
Term
Prevents the appearance of recombinants in the progeny.
Definition
Inversion
Term
Allows the phenotypic expression of a recessive allele when it is not homozygous.
Definition
Deletion (pseudodominance)
Term
Can lead to a genotype with three copies of a given gene but is not a trisomy.
Definition
Duplication
Term
Transposable elements can lead to most chromosome rearrangements when two elements
that are close by undergoing... (3 words)
Definition
Unequal crossing over
Term
Bacterial transposable elements containing antibiotic resistance genes are called...
Definition
Transposons
Term
Continuous variation is sometimes the result of the ___________ effect of multiple alleles at different genes.
Definition
Additive
Term
In _____________ traits, the phenotypes are determined by the effects of several genes and the influence of the environment.
Definition
Multifactorial
Term
_____________ (2 words) is defined as the differences in genotypes between members of a population.
Definition
Genetic variance
Term
_____________ is the percent of phenotypic variance due to genetic variance.
Definition
Heritability
Term
_____________ (3 words) studies aim to identify regions of the chromosomes where genes implicated in complex traits are located.
Definition
Whole Genome Association
Term
Two features (of three) common to all transposable elements.
Definition
- Terminal inverted repeats
- Flanking direct repeats
- Sequences coding for enzymes involved in transposition
Term
Name the two transposable elements discovered in corn by B. McClintock.
Definition
Ac/Ds
Term
Indicate the name of the enzyme involved in transposition by DNA intermediates.
Definition
Transposase
Term
Indicate the name of the enzyme involved in transposition by RNA intermediates.
Definition
Reverse transcriptase
Term
Name the transposable element responsible for hybrid dysgenesis in Drosophila.
Definition
P-element
Term
Identify the chromosome aberration that shifts genetic material from one chromosome to a non-homologous chromosome.
Definition
Translocation
Term
Inversions are often also called... (3 words)
Definition
Crossing-over-suppressor
Term
A chromosome with two centromeres is known as...
Definition
Dicentric
Term
The general term for deviation from normal diploidy is...
Definition
Aneuploidy
Term
Trisomies are the result of meiotic _____________ during either meiosis I or II.
Definition
Non-disjunction
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