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Genetics, Aging and Reproduction

Across
embryo formed by meiosis
new individual is an outgrowth of parent
A progressive genetic disorder that causes children to age rapidly
Type of hermaphrodite Examples: wrasse fish and clown fish
Type of dominance in which genes blend expression
one organism produces genetically identical copies (clones)
both dominant and recessive genes express themselves
1 gene can affect more than one trait
Example:blood types, expression of trait using 3 or more genes
Specific characteristic that varies from one individual to another
Failure of chromatids to properly separate during meiosis
Type of inheritance in which several pairs of genes all affect the same trait (color of skin, hair, eyes)
Cell division creating gametes
Process begun 2/3 through puberty
Reproduction generally involves two parents that produce haploid gametes (Meiosis)
Genetic coding for dominant or recessive traits
specialized cells clump together, surrounded by spicules (skeletal structures) and tough spongin coat
identifies and locates where specific genes are located on various chromosome
Down
Body cavity in the mesoderm
Chemical factors that determine a trait
Take electrons from other molecules, neutralized by antioxidants
Reproduction by mitosis (cloning)
pieces of adult break off, regenerate into new adults
Bisexual reproduction with separate sexes
Ends of chromosomes
one organism with both sets of reproductive organs
Development of an embryo from an UN-fertilized egg
Genes are separated from each other during gamete formation in meiosis
a third layer of cells (in the middle)
after fertilization, zygote divides repeatedly (mitosis) until a hollow ball of 100’s of cells is formed
Syndrome caused by 3 copies of the 21st chromosome (trisomy)
Different forms of a gene