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Sexual Reproduction
Note cards due 5/14
24
Biology
9th Grade
05/14/2013

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Cards

Term
Allele
Definition
alternative form that a single gene may have for a particular trait
Term
Crossing Over
Definition
exchange of chromosomal segments between a pair of homologous chromosomes during prophase 1 of metaphase.
Term
Diploid
Definition
cell with two copies of each chromosome (2n).
Term
GENE
Definition
funtional unit that controls inherited trait expression passed on from on generation to another.
Term
DOMINANT
Definition
Mendel's name for a specific trait that appearded in the F1 generation.
Term
FERTILLIZATION
Definition
process by which haploid gametes combine, forming a diploid cell with 2n chromosoes. b
Term
GENETIC RECOMBINATION
Definition
new combination of genes produced by crossing over and independant assortment
Term
GENOTYPE
Definition
An organism's allel pairs.
Term
GAMETE
Definition
a haploid sex cell formed during meiosis
Term
Haploid
Definition
cell with half the n umber of chromosomes (n) as a diploid (2n) cell
Term
HOMOZYGOUS
Definition
organism with two of the same allels for a specific trait
Term
HETEROZYGOUS
Definition
organism with two different alleles for a specific trait
Term
HYBRID
Definition
organism heterozygous for and specific trait
Term
HOMOLOGOUS CHROMOSOMES
Definition
two paired chromosomes, one from each parent, that carries genes for a specific trait.
Term
LAW OF INDEPENDENT ASSORTMENT
Definition
Mendelian law stating that a random distribution of alleles occurs during the formation of gametes
Term
LAW OF SEGREGATION
Definition
Mendelian law stating that two alleles for each trait seperate during meiosis
Term
POLYPLOIDY
Definition
one or more extra sets of all chromosomes
Term
MEIOSIS
Definition
only in reporductive cells,
Term
RECESSIVE
Definition
Mendel's name for a specific trait hidden or masked in the F1 generation
Term
PHENOTYPE
Definition
observable characteristic that is expressed as a result of an allele pair.
Term
N
Definition
number pof chromosomes
Term
types
Definition

S- Smooth 

s- wrinkled 

G-     green 

g-    yellow 

Term

How many chromosomes in human sperm or egg? 

Definition
23
Term

Humans- 

Bananas- 

Strawberries

Spiders-  

Dog-

Definition

H- 23 pairs (46)

B- 22

SB- 7, but there are multiple sets(8)

S- There are tens of thousands of species of spiders, all genetically different with different numbers of chromosomes. 

D- 78 (76 autosomal and 2 sexual.)

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