Chapter13 Flashcards
Homologs separate
Meiosis 1
Sister chromatids separate
Meiosis 2
The transmission of traits from one generation to the next
Heredity
The scientific study of heredity and hereditary variation
Genetics
Reproductive cells (sperm and eggs)
Gametes
____ molecule coiled in association with various proteins
DNA
DNA molecule coiled in association with various _____
Proteins
A gene’s specific location along the length of a chromosome
Locus
Not sexual, 1 parent, mitosis, offspring are exact copies of parent
Asexual reproduction
2 parents, sperm and egg, meiosis, offspring are genetically different
Sexual reproduction
Generation to generation sequence of stages in the reproductive history of an organism from conception to production of its own offspring
Life cycle
A display of condensed chromosomes arranged in pairs
Karyotype
Female sex chromosomes
XX
Male sex chromosomes
XY
Other chromosomes are called
Autosomes
A ____cell is any cell with 2 chromosome sets and is referred to as 2n
Diploid
Humans diploid number
46
Haploid number in humans
23
How many Autosomes in a human haploid number
22
Union of gametes
Fertilization
The fertilized egg and is 2n (always haploid)
Zygote
The only cells not produced by mitosis are
Gametes
Gametes are formed by
Meiosis
Sister chromatids make up one replicated
Chromosome
DNA is packaged into
Chromosomes
Prelude to crossing over, lining up of homologous
Synapsis
Genetic rearrangement between non sister chromatids
Crossing over
Meiosis 1 is often called reduction division because it halves the number of
Chromosomes
