Codominance
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A condition in which both alleles for a gene are fully expressed
ex: AB blood type
Mitosis v Meiosis
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1) Mitosis forms two diploid cells with the same number of chromosomes as
the parent cells v. Meiosis forms four haploid cells with half the number of
chromosomes as the parent cell
2) Mitosis requires 1 nuclear division, Meiosis requires 2 nuclear divisions
3) Meiosis results in daughter cells that are not identical to each other or
the parent cells. Mitosis results in daughter cells that are genetically
identical to each other and the parent cell.
heterozygote advantage
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individuals who are heterozygous at a particular locus have greater fitness
than do both kinds of homozygotes
ex: sickle cell carrier
Phylogenetics
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the study of evolutionary relationships among species, relatedness, uses
phylogenetic trees
antigenic drift vs antigenic shift
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, In drift, small changes affect the surface spikes and cause mutations so that
antibodies become less effective
In shift, new combinations of surface spikes may form containing RNA from
two different viruses. This can lead to worldwide epidemics
What is meant when two genes are said to be linked?
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All alleles are on one chromosome and they are inherited together; they
do not show independent assortment
The end result of meiosis is ______
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daughter cells with the haploid number of homologous chromosomes
3 ways bacteria can increase their genetic variation
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Conjugation: takes place when a donor cell passes DNA to a recipient cell
by way of a sex pilus (tube)
Transformation: occurs when a bacterium takes up DNA released into the
environment by dead bacteria
Transduction: viruses carry portions of bacterial DNA from one bacterium
to another
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A condition in which both alleles for a gene are fully expressed
ex: AB blood type
Mitosis v Meiosis
,Give this one a try later!
1) Mitosis forms two diploid cells with the same number of chromosomes as
the parent cells v. Meiosis forms four haploid cells with half the number of
chromosomes as the parent cell
2) Mitosis requires 1 nuclear division, Meiosis requires 2 nuclear divisions
3) Meiosis results in daughter cells that are not identical to each other or
the parent cells. Mitosis results in daughter cells that are genetically
identical to each other and the parent cell.
heterozygote advantage
Give this one a try later!
individuals who are heterozygous at a particular locus have greater fitness
than do both kinds of homozygotes
ex: sickle cell carrier
Phylogenetics
Give this one a try later!
the study of evolutionary relationships among species, relatedness, uses
phylogenetic trees
antigenic drift vs antigenic shift
Give this one a try later!
, In drift, small changes affect the surface spikes and cause mutations so that
antibodies become less effective
In shift, new combinations of surface spikes may form containing RNA from
two different viruses. This can lead to worldwide epidemics
What is meant when two genes are said to be linked?
Give this one a try later!
All alleles are on one chromosome and they are inherited together; they
do not show independent assortment
The end result of meiosis is ______
Give this one a try later!
daughter cells with the haploid number of homologous chromosomes
3 ways bacteria can increase their genetic variation
Give this one a try later!
Conjugation: takes place when a donor cell passes DNA to a recipient cell
by way of a sex pilus (tube)
Transformation: occurs when a bacterium takes up DNA released into the
environment by dead bacteria
Transduction: viruses carry portions of bacterial DNA from one bacterium
to another
