My Personal Flashcards
(3 cards)
1
Q
How does crossing over during meiosis increase genetic variation?
A
In prophase 1, homologous chromosome twist around each other forming a bivalent.
Chromosomes in homologous pairs break and exchange causing a genetic recombination.
Different combination of alleles
2
Q
What are the differences between introns and exons in genes?
A
Introns are non-coding DNA within genes while exons are coding DNA within a gene
3
Q
What are the potential effects of mutagenic agents like UV light on DNA?
A
Mutagenic agents causes mutations in DNA by increasing the frequency of genetic alterations beyond the natural background level.
The effects of this is
A) Base sequence changes
B) Altered amino acid sequences
C) Changes in enzyme shape
D) Frameshift mutations
