mini test 3 Flashcards
Mutation
is any change or mistake in the genes or chromosomes
True or False. A mutatation is always a bad thing
False
2 effects of mutation
can result 2 disease and lead to death. And is impossible for organisms to survive
Benefits of mutation
Gives the organisms a sudden new advantage . And contributes to genetic variations.
Can a mutation be tranferred to your kid if its in your skin or body cells?
NO
How can a mutation be transferred to your kid?
If its in your egg cells or sperm
What causes down syndrome?
Nondisjunction
Deletions:
A chromosome segment is lost
Translocation:
When A chromosome breaks off and becomes reattached to a non-homologous chromosome
Inversion:
When A chromosome segment breaks off and becomes reattached at a new point
Duplications:
a chromosomal segment repeats
Insertion:
the addition of nucleotide pairs in a gene
substitution
a mutation in which there is a letter change. such as switching a T to a C
Every cell in our body has 46 chromosomes with
the SAME DNA
The use of the information from a gene is called
GENE EXPRESSION
