Download 03Heridity & Environment

03-Heredity and environment – Discussion
1. Your heredity is based on your ______________________, which is your full set of genes.
Every cell has ____________ pair of _______________________________, which are made up of
____________________. Sections of which are ________________________, which control your
______________________________________ characteristics.
Some of these inherited characteristics such as your eye color are part of your
____________________________________, whereas other non-observable items such as an
inherited cancer gene is part of your _________________________________________.
2. When one egg splits, it produces _______________________________ (identical) twins,
whereas if two separate eggs are fertilized they produce _____________________________
(fraternal) twins. If twins are both male, the 23rd pair of chromosomes will be
___________, but is they are female, this pair will be _________________.
3. When chromosome abnormalities occur, they are most often associated with the
age of the _________________________.