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23 Cards in this Set

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In a mutation called a ____, the chromosome fragment attaches to its homologous chromosome, which will then carry two copies of a certain set of genes.
Duplication
What is it called when the fragment reattaches to the original chromosome in the reverse orientation, producing a mutation?
Inversion
What is this event called when teh fragment may join a nonhomologous chromosome?
Translocation
What are the chromosome called when they carry teh genes that determine an individual's sex?
Sex Chromosomes
Of the 23 pairs of chromosomes in human somatic cells, 22 pairs are the same in males and females, these chromosomes are called _____?
Autosomes
What is a segment of DNA that transmits information from parent to offspring.
Gene
What is a rod-shaped structure that forms when a single DNA molecule and its associated proteins coil tightly before cell division?
Chromosome
When a chromosome forms a copy of itself, what is the called?
chromatids
What is the point called where 2 chromatids meet at?
Centromere
A human cells have 23 chromosomes, what are the pair called?
Homologous chromosomes
What is the point called where 2 chromatids meet at?
Centromere
Human cells have 23 different chromosomes, body cells contain two copies of each chromosome, for a total of 46 chromosomes.The two copies of each chromosomes are called WHAT?
Homologous chromosomes
When a cell contains two homologues of ewach chromosomes, it is termed WHAT?
Diploid
When is a egg cells adn sperm cells termed?
Gametes
A ------- cell contains only one homologue of each chromosome.
Haploid
What is the first stage of human development?
Zygote
What is the condition in which a diploid cell has an extra chromosome?
Trisomy
When a cell divides normally, each chromosoem adn its homologue, what is this event called?
Disjunction
When normal disjunction does not occur, one or more chromosomes may fail to separate properly, what is this accident called?
Nondisjunction?
What is this process called whan a physician uses a needle and syringe to remove a small amount of the fluid from the amniion, the sac that surrrounds the fetus?
Amniocentesis
In ___ __ ____, a physician analyzes a karyotype made using cells grown from a sample of the chorioic villi, fingerlike extersions of teh placenta that grow into teh mother's uterus.
Chorionic Villi Sampling
What are changes in an organism's genetic material.
Mutations
What is it called when a fragment of a chromosome breaks off,causing a mutation called ________?
Deletion