ARCH 270- Genetics

21 cards

For a university level class on the introduction to human evolution. From the chapter on genetics


 
  
Created Oct 15, 2011
by
elb849

 

 
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1
Principle of Segregation
 
genes occur in pairs, separating during gamete (sex cell) production so that each...
2
allele
 
an alternative form of a geneOccur at the same locus (or position) on homologous chromosomes.
3
recessive
 
an allele whose effect is masked in the  presence of another different allele
4
dominant
 
an allele that masks the effects of another
5
principle of independent assortment
 
genes controlling different traits are inherited independently of one another (true...
6
cells
 
The basic unit of life in all living things
7
somatic cells
 
comprise body tissues and contain a full complement of genetic information
8
gametes
 
sex cellsspecifically involved in reproduction transmitting genetic information from parent...
9
DNA structure
 
2 chains of nucleotides, each composed of a sugar molecule, a phosphate unit and one of 4 nitrogen...
10
DNA functions
 
1) Replication during cell division2) Protein synthesis
11
Mitosis
 
simple cell division; the process by which somatic cells divide to produce two identical daughter...
12
Meiosis
 
Specialized cell division for gamete production; involves 2 divisions and results in 4 daughter...
13
Gene
 
A segment of DNA that specifies the sequence of amino acids in a particular protein.Paired:...
14
Types of Chromosomes
 
1) Sex chromosomes2) Autosomes-- govern all physical characteristics except sex determination
15
Homozygous
 
Having the same allele at the same locus on both members of a chromosome pair
16
Genotype
 
an individual's genetic makeup, either the entire genetic makeup or the alleles at a particular...
17
Phenotype
 
The detectable expressions of genotypes
18
Polygenic
 
a phenotypic trait that is influenced by genes at two or more loci
19
Pleiotropic
 
Several seemingly-unrelated phenotypic traits that are influenced by the actions of a single...
20
Codominance
 
the expression of 2 alleles in heterozygotes: neither is dominant or recessive, so both influence...
21
Hemizygous
 
Having only one member of a pair of allelesBecause males have only one X chromosome, all X-linked...

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