Flashcards in Human Inheritance (T3) Deck (9):
Female gametes (eggs) contain .... chromosomes?
Male gametes (sperm) contain what chromosomes?
X or Y
In human reproduction what chance is there of a fertilised egg becoming a boy or a girl?
What does a biologist mean when they refer to 'variation' in living organisms?
The study of differences between different species.
Some characteristics of an organism are affected by the environment.
Some characteristics can only be inherited.
Some characteristics are caused by a combination of environmental and inherited factors.
What are the sex chromosomes in male mammals?
X and Y
What are the sex chromosomes in female mammals?
X and X
Give two examples of characteristics caused by the environment
- the language we use
- whether we have scars
Give three examples of inherited characteristics..
- the shape of earlobes
- eye colour
- nose shape