Biol 207 Midterm 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
Which stage does DNA replication occur? - CORRECT ANSWER - S phase
What are the 3 cohesin proteins? - CORRECT ANSWER - Smc3, Smc1, Scc1
What do protected cohesins hold together? - CORRECT ANSWER - sister chromatids
When are cohesin rings broken? - CORRECT ANSWER - before anaphase
how many chromosomes are in an embryo to adult stage? - CORRECT ANSWER - 2n=46
how much DNA is in a 2n organism at G1, S, G2, M? - CORRECT ANSWER - 2c, 4c, 4c,
2c
what do unprotected cohesins hold together? - CORRECT ANSWER - homologous
chromosomes
Do protected or unportected cohesins get broken during anaphase 1? - CORRECT
ANSWER - unprotected
anaphase 2 breaks which cohesins? - CORRECT ANSWER - protected
spermatogenesis and oogenesis are what type of process? - CORRECT ANSWER -
gametogenesis
Oogenesis: what are the end products? - CORRECT ANSWER - one large haploid cell and
polar bodies
, Process of oogenesis? - CORRECT ANSWER - 1) meiosis in fetus
2) pause in prophase 1
3) puberty - once a month cells resume meiosis, enter oviduct, can be fertilized
dizygotic twins occur how? - CORRECT ANSWER - fraternal twins - 2 zygotes, 2
blastocysts
two ways monozygotic twins occur? (least common) - CORRECT ANSWER - 1 zygote
splits at the two cell stage, 2 blastocysts OR 1 blastocyst splits into two -- same membrane for
pregnancy
Corn produces ... - CORRECT ANSWER - pollen and eggs
yeast produces... - CORRECT ANSWER - a/alpha cells that produce a and alpha cells
through meiosis
cell fusion - CORRECT ANSWER - haploid yeast cells do this to make diploid cells
(a/alpha cells)
what process makes one multicellular organism or many unicellular organisms - CORRECT
ANSWER - mitosis
can alpha fuse with alpha cells - CORRECT ANSWER - no. alpha can only fuse with a
meisosis of a/alpha cell produces... - CORRECT ANSWER - two a and two alpha cells
yeast uses what mechanism during mitosis - CORRECT ANSWER - budding
Exam Questions and CORRECT Answers
Which stage does DNA replication occur? - CORRECT ANSWER - S phase
What are the 3 cohesin proteins? - CORRECT ANSWER - Smc3, Smc1, Scc1
What do protected cohesins hold together? - CORRECT ANSWER - sister chromatids
When are cohesin rings broken? - CORRECT ANSWER - before anaphase
how many chromosomes are in an embryo to adult stage? - CORRECT ANSWER - 2n=46
how much DNA is in a 2n organism at G1, S, G2, M? - CORRECT ANSWER - 2c, 4c, 4c,
2c
what do unprotected cohesins hold together? - CORRECT ANSWER - homologous
chromosomes
Do protected or unportected cohesins get broken during anaphase 1? - CORRECT
ANSWER - unprotected
anaphase 2 breaks which cohesins? - CORRECT ANSWER - protected
spermatogenesis and oogenesis are what type of process? - CORRECT ANSWER -
gametogenesis
Oogenesis: what are the end products? - CORRECT ANSWER - one large haploid cell and
polar bodies
, Process of oogenesis? - CORRECT ANSWER - 1) meiosis in fetus
2) pause in prophase 1
3) puberty - once a month cells resume meiosis, enter oviduct, can be fertilized
dizygotic twins occur how? - CORRECT ANSWER - fraternal twins - 2 zygotes, 2
blastocysts
two ways monozygotic twins occur? (least common) - CORRECT ANSWER - 1 zygote
splits at the two cell stage, 2 blastocysts OR 1 blastocyst splits into two -- same membrane for
pregnancy
Corn produces ... - CORRECT ANSWER - pollen and eggs
yeast produces... - CORRECT ANSWER - a/alpha cells that produce a and alpha cells
through meiosis
cell fusion - CORRECT ANSWER - haploid yeast cells do this to make diploid cells
(a/alpha cells)
what process makes one multicellular organism or many unicellular organisms - CORRECT
ANSWER - mitosis
can alpha fuse with alpha cells - CORRECT ANSWER - no. alpha can only fuse with a
meisosis of a/alpha cell produces... - CORRECT ANSWER - two a and two alpha cells
yeast uses what mechanism during mitosis - CORRECT ANSWER - budding
