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Bio-heredity

Stack #55008

QuestionAnswer
Heredity transmission of traits from one generation to another
Variation differences in expression of traits
Genetics study of heredity and variation
What is a gene? segment of DNA, instructions for a polypeptide, instructions for cells to make specific enzymes and proteins, requires precise replication, mainly in nucleus(some in mitochondria and chloroplasts)
Locus precise location of a gene on a chromosome
Asexual offspring is exactly the same as parent; only one parent; clone
Sexual offspring similar, but different than parents; 2 parents; much greater variation
Karyotype picture of chromosomes from one cell
Gamates sperm and egg
Haploid one set of chromosomes(gamates are haploid)
Somatic body cells (everything but the sex chromosomes)
Diploid a set or pair of chromosomes
Fertilization when the sperm and egg join together
Zygote the combination of sperm and egg before it divides
Prophase preparing nucleus for division, chromosomes condense, nuclear membrane disappears
Metaphase chromosomes line up in the middle
Anaphase chromatids seperate
Telophase nucleus re-forming
Meiosis I includes interphase I, prophase I, metaphase I, Anaphase I
prophase I Homologus pair fertilize- become tetrads
Prophase I tetrads line up in the middle
Anaphase I homologous pairs seperate, sister chromatids remain attached at centromere
Telophase I and Cytokinesis chromatids remain attached
Meiosis II very similar to Meiosis I...centromeres split and sister chromatids seperate
Created by: kcmerkt
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