one nucleotide is taken away from a gene or DNA sequence
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What is an insertion mutation?
The addition of a single nucleotide
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What is a duplication mutation?
repeats a segment
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What is an inversion mutation?
Reverses a segment within a chromosome
* BDE -> BED
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What is a translocation mutation?
moves a segment from one chromosome to another, nonhomologous one
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What type of chromosomal mutation is least disruptive?
point mutation because one base pair is exchanged and frame shift does not occur
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What does mitosis produce?
2 identical diploid cells
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What does meiosis produce?
4 differing haploid cells
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What does meiosis result in?
daughter cells with half the number of chromosomes as the parent cell
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What happens in anaphase II?
sister chromatids separate
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Where does crossing over occur?
prophase I
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Where does random assortment occur?
metaphase I
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These chromosomes possess the same structure and genes, but are not identical. They contain different alleles for the same genes. Offspring receive one from each parent.
homologous chromosomes
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Name the pattern of inheritance: males primarily affected. Women are typically carriers because they have 2 X chromosomes. Fathers cannot pass on to sons.
x linked recessive
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once you solve for chi square to make meaning of your calculation, what is your next step?
determine the degrees of freedom
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The closer two linked genes are on a chromosome, the ______ likely they are to be separated by crossing over?
less
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the environment can change the ________ of an organism
phenotype
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Choose the correct genotype for two traits of a recessive individual in a pure breeding parent generation
aabb
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a type of mutation where chromosomes do not separate properly during meiosis
nondisjunctional
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Diploid number is 50, what is haploid number?
25
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process by which sexually reproducing organisms produce genetically diverse haploid gamates?
meiosis
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crossing over results in…
recombinant chromatids
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Name the inheritance pattern: affected mothers with all affected children
mitochondrial
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two genes on the same chromosomes have a recombination frequency of 25%. How many map units are they apart from each other?
25 map units
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How many cell divisions are in meiosis?
2
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During crossing over ________ exchange genetic information
non sister chromatids of homologous chromosomes
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Name the pattern of inheritance: unaffected parents have affected offspring
autosomal recessive
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Chromosomes moving to opposite ends of the cell during anaphase takes place during….
both mitosis and meiosis
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Due to light level changes in the environments, an arctic hare’s fur changes from white to brown depending on the season. How has the hare changed?
the phenotype changed
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T/F Homologous chromosomes separate during anaphase I
TRUE
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Mutations during _______ can be passed on to offspring
meiosis
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Chi square vale is 6.2. Critical value is 7.81.
fail to reject the null. results are due by chance, the chi square value is less than the critical
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3 ways meiosis contributes to genetic diversity
fertilization, crossing over, random assortment
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reproduction that does not require the production and fusion of gametes?
asexual reproduction
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a benefit of sexual reproduction
increases genetic diversity
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Choose the correct genotype for an individual who is homozygous dominant for two traits
AABB
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Chromosomes lining up in the middle of the cell takes place in….
both mitosis and meiosis
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T/F When genes are linked the majority of the phenotypes of the offspring will resemble the phenotypes of the parents