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Chp.13 Meiosis and Sexual Life Cycles
Lanom-WCJC
27
Biology
Undergraduate 1
11/12/2012

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Term
Genetics
Definition
Study of heredity and variation
Term
Heredity
Definition
Transmission of traits from 1 generation to the next
Term
Variation
Definition
Demonstrated by difference in appearance that offspring show from parent and siblings
Term
Genes
Definition
Units of heredity made from segments of DNA
Term
Gametes
Definition
Sperm and egg
Term
Locus/loci
Definition
Specific location for a gene ON and chromosome
Term
Asexual Reproduction
Definition
1 parent producing a genetically identical offspring of MITOSIS
Term
Sexual Reproduction
Definition
2 parents give birth to an offspring with unique genes
Term
Karyotype
Definition
A picture of the ordered display of chromosomes
Term
Homologous Chromosomes
Definition
2 chromosomes in each pair, all are same length and carry genes controlling the same inherited characters
Term
Autosome
Definition
Chromosomes that do not determine gender
Term
Diploid Cell/ 2n
Definition
2 sets of chromosomes, 2n=46 chromosomes. After it is replicated it is 2n2
Term
Ovum
Definition
Unfertilized egg
Term
Zygote
Definition
Fertilized egg
Term
Fertlization
Definition
Union of gametes
Term
Reductional Division
Definition
2 haploid daughter calls with replicated chromosomes
Term
Equational Division
Definition
4 haploid daughter cells with unreplicated chromosomes
Term
Synapsis
Definition
Homologous chromosomes that loosely pair up and are aligned up gene by gene
Term
Crossing-Over
Definition
non-sister chromatids each pair up to form a tetrad
Term
tetrad
Definition
Group of 4 chromatids
Term
Chiasma
Definition
Chromatids that cross-over to form an X
Term
Interkinesis
Definition
Short time period between Meiosis I and Meiosis II
Term
Independent Assortment
Definition
Random way of tetrads lining up at metaphase plate
Term
Spermatogenesis
Definition
Make sperm
Term
Spermatocytes
Definition
Parent diploid cell in testes
Term
Oogenesis
Definition
Make eggs
Term
Oocytes
Definition
Parent diploid cell in ovaries
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