Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
sec 11.3
Chromosomes and Human Heredity
| Question | Answer |
|---|---|
| A photograph of pairs of homologous chromosomes arranged in decreasing size. In a human this consists of 23 pairs, 22 pairs of autosomes and 1 pair of sex chromosomes | Karyotype |
| this tool of genetics can help determine chromosome errors such as missing chromosomes or extra chromosomes | Karyotype |
| During meiosis the sister chromatids may not separate properly, causing the wrong number of chromosomes in gametes and organisms...this is called ? | Nondisjunction |
| Two chromosome conditions that can result from nondisjuction | monosomy and trisomy |
| Having a set of three chromosomes of one kind is called | trisomy |
| having only one of a particular type of chromosome is called | monosomy |
| A condition that is the result of 3 #21 chromosomes ( a trisomy of #21) | Down Syndrome |
| What factor causes the frequency of Down syndrome to increase | older mothers |
| What problems come about as a result of Down Syndrome | distinctive facial features, short, heart defects, and mental disabilities. |
| Types of chromosomes that can do go through nondisjuction | autosomes and sex chromosomes |
| The normal sex chromosomes of a female are XX but with nondisjunction the sex chromosomes could be ______ ( a monosomy) or ______ ( a trisomy) | XO or XXX |
| the normal male sex chromosomes are XY... two trisomy conditions that result from nondisjunction of male sex chromosomes are ____ or _____ | XXY or XYY... ( the monosomy OY results in death) |
Created by:
shemehl