Science Revision Genes. Flashcards
1
Q
what is evolution?
A
they way that organisms have developed over millions of years.
2
Q
what does extinct mean?
A
when a species die out so there is non of that kind alive.
3
Q
what can extinction be caused by?
A
changes to the environment destruction to their habitat new diseases introduction of new predators increases competition.
4
Q
what is genetic modification?
A
is the process which scientists can use in order to alter the genes of an organism.
5
Q
what are characteristics?
A
they are passed along from parents to their offspring.
6
Q
how many chromosomes do sperms and eggs contain?
A
23 chromosomes.
7
Q
what is DNA?
A
is the material which contains all of this genetic information?
