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Grade 7 science Unit 3 vocabulary
assessment cellular respiration and heredity
40
Science
7th Grade
11/04/2013

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Term
cell cycle
Definition
growth, development, and division
Term
centromere
Definition
structure that holds sister chromatids together
Term
cytokinesis
Definition
division of a cells cytoplasm and contents
Term
daughter cells
Definition
two new cells that result from mitosis and cytokinesis
Term
eukaryotic
Definition
cell with membrane bound structur3es
Term
interphase
Definition
cells period of growth and development
Term
mitosis
Definition
division of a cells nucleus and contents
Term
sister chromatids
Definition
one of the two identical strands of dna that make up a duplicated chromosome
Term
complex
Definition
made of two or more parts
Term
fiber
Definition
long muscle cell
Term
diploid
Definition
describes a cell that has pairs of chromosomes
Term
dna
Definition
genetic information in a cell
Term
egg
Definition
female sex cell
Term
fertilization
Definition
joining of an egg and sperm
Term
haploid
Definition
describes a cell tha thas only one chromosome from each pair
Term
meiosis
Definition
process in which one diploid cell divides to make haploid sex cells
Term
sexual reproduction
Definition
production of offspring
Term
sperm
Definition
male sex cell
Term
zygote
Definition
new cell formed through fertilization
Term
asexual reproduction
Definition
production of offspring by one parent without meiosis and fertilization
Term
budding
Definition
asexual reproduction in which a new organism grows on the body of its parent
Term
cloning
Definition
lab procedure that produces identical individuals from a cell or cells taken from an organism
Term
binary fission
Definition
cell division in prokaryotes that forms two genetically identical cells
Term
regeneration
Definition
asexual reproduction in which a new organism grows from a piece of its parent
Term
dominant trait
Definition
genetic factor that blocks another genentic factor
Term
egg
Definition
haploid sex cell formed in the female reproductive organ
Term
genetics
Definition
study of how traits are passed from parents to offsprint
Term
heredity
Definition
passing of traits from parents to offspring
Term
hybrid
Definition
offspring of two plants or animals with different forms of the same trait
Term
recessive trait
Definition
genetic factor that is blocked by the presence of a dominant factor
Term
sperm
Definition
haploid sex cell formed in the male reproductive organs
Term
allele
Definition
different form of a gene
Term
codominance `
Definition
occurs when both alleles can be observed in the offsprings phenotype
Term
gene
Definition
section on a chromosome that hsa genetic information for one trait
Term
genotype
Definition
two alleles that control the phenotype of a trait
Term
heterozygous
Definition
having two different alleles of a gene
Term
homozygous
Definition
having the same two alleles of a gene
Term
incomplete dominance
Definition
occurs when the offsprings phenotype is a blend of the parents phenotypes
Term
phenotype
Definition
how a trait appears or is expressed
Term
polygenic inheritance
Definition
occurs when multiple genes determine the phenotype of a trait
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