p.o.i. part 5 Flashcards
1
Q
how can linkage overcome
A
during meiosis, there is a stage called crossing over. Only through crossing over linkage can overcome
2
Q
during which phase the chromosome replicates its own sister chromatid
A
during S phase
3
Q
what happens during the pachytene stage
A
some segments of the non sister chromatids can get exchanged
4
Q
what are the types of chromosomes
A
two:Autosomes(22 pairs) and Sex chromosomes (1 pair)
5
Q
concept of Sex chromosomes
A
they are diff. in male and female
female- XX
male - XY
6
Q
pleiotropy
A
a single gene can exhibit multiple phenotypic expression
7
Q
example of pleiotropy
A
a disease phenylkutonuria caused by the mutation of the gene which codes for the enzyme phenyl alanine hydroxylase
