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Life Science:Genes and Molecular Machines (Heredity (Phenotype (Is…
Life Science:Genes and Molecular Machines
Heredity
Phenotype
Is organisms characteristics and traits
this is observable
Organisms physical apperance
Genotype
Genetic makeup
Determines the phenotype
Determines one of the characteristics
Types of cells
Prokaryotic
Have no nucleus
DNA is scattered in the nucleoid
Lack organelles
Eukaryotic
Include fungi and tiny plants and animals
Enclosed by a plasma membrane
Have a nucleus
Cell Division
Meiosis
Results in four daughter cells
four daughter cells with half the number of chromosones
Helps grow
Mitosis
Results in two daughter cells
Two daughter cells have same kind of chromosones
Same kind of chromosomes as parents
Flowering Plants and Seeds
Self Pollination
When pollen is transferred to same plant
Parent plant usually dies lacking of nutrients
Pollination
Pollinators help plants out by spreading pollen
way of plant reproduction by help