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bio 1 test sarah nation
yeah
16
Biology
Undergraduate 2
02/04/2011

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Term
Somatic cells 
Definition

nonsexual; 46 chromosomes (23 from each parent); diploid (2 chromosome sets per cell)

Term
Gametes
Definition

sexual cells; sperm/eggs; haploid (1 chromosome set per cell)

Term
Autosomes
Definition
Any of the 22 pairs of chromosomes which do not determine gender
Term
Sex chromosomes 
Definition

X and Y; determine gender of offspring

Term
Heredity
Definition

the transmission of traits from one generation to the next

Term
Genetics
Definition

scientific study of heredity and hereditary variation

Term
Genes
Definition

hereditary units; specific DNA sequence

Term
Locus
Definition

gene’s chromosomal location

Term
Gametes
Definition

reproductive cells; produced by parental units

Term
Asexual
Definition

one parent, offspring genetically identical (i.e. a clone

Term
Sexual
Definition

two parents, offspring genetically different from both; genetic variation

Term
Karyotype
Definition

ordered display of all 46 chromosomes in pairs/by type (i.e. homologous chromosomes/homologs)
Length, staining pattern, position of centromere

Term

Zygote 

Definition

Diploid cell
Fertilization of gametes
2n = 46

Term

Germ cells

Definition

Form gametes
Located in gonads
Formed by meiosis
n = 23

Term
Meiosis
Definition

Cell division which reduces the number of chromosome sets
From diploid to haploid
Allows for diploid organism post-fertilization
Preceded by chromosome replication
Animals, plants, fungi
Two divisions = 4 daughter cells 

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