BIOLOGY 1201 EXAM 3 2026 STUDY GUIDE
REVISION SHEET CORE CONCEPT
BREAKDOWN
◉ How many centromeres are there per chromosome?
Answer: 1
◉ How many centrosomes per chromosome consist of 2 sister
chromatids?
Answer: 1
◉ When is DNA replicated?
Answer: S phase
◉ When are sister chromatids separated?
Answer: Anaphase I
◉ If the DNA content in G2 is X, what is the DNA content of each
daughter cell at Telophase?
Answer: 0.5X
,◉ If the DNA content in G1 is X, what is the DNA content of each of
the daughter cells at Telophase?
Answer: X
◉ DNA replication checkpoint occurs where?
Answer: G2
◉ We inherit our mitochondria from our...
Answer: our mother
◉ In mitosis when do homologous chromosome pairs separate?
Answer: in mitosis, homologous chromosomes do not separate
◉ In meiosis when do homologous chromosome pairs separate?
Answer: Anaphase I
◉ At G2, the amount of DNA is X. At Telophase II the amount of DNA
in each of the daughter cells is...
Answer: 0.25X
◉ At G1, the amount of DNA is X. At Telophase II the amount of DNA
in each of the daughter cells is...
, Answer: 0.5X
◉ At G2 there are 40 chromatids, what is the diploid chromosome
number?
Answer: 20
◉ At G2 there are 40 chromatids, at Telophase II each daughter cells
has how many chromosomes?
Answer: 10
◉ At G2, there are 40 centrosomes, at Telophase II each daughter
cell has how many chromosomes?
Answer: 20
◉ Why don't we talk about Gossian genetics?
Answer: he was not quantitative with his work
◉ What is the alternative form of a gene?
Answer: allele
◉ How many different alleles can a diploid individual have at a
single gene locus if there are 4 alleles in the population?
Answer: 2 alleles
REVISION SHEET CORE CONCEPT
BREAKDOWN
◉ How many centromeres are there per chromosome?
Answer: 1
◉ How many centrosomes per chromosome consist of 2 sister
chromatids?
Answer: 1
◉ When is DNA replicated?
Answer: S phase
◉ When are sister chromatids separated?
Answer: Anaphase I
◉ If the DNA content in G2 is X, what is the DNA content of each
daughter cell at Telophase?
Answer: 0.5X
,◉ If the DNA content in G1 is X, what is the DNA content of each of
the daughter cells at Telophase?
Answer: X
◉ DNA replication checkpoint occurs where?
Answer: G2
◉ We inherit our mitochondria from our...
Answer: our mother
◉ In mitosis when do homologous chromosome pairs separate?
Answer: in mitosis, homologous chromosomes do not separate
◉ In meiosis when do homologous chromosome pairs separate?
Answer: Anaphase I
◉ At G2, the amount of DNA is X. At Telophase II the amount of DNA
in each of the daughter cells is...
Answer: 0.25X
◉ At G1, the amount of DNA is X. At Telophase II the amount of DNA
in each of the daughter cells is...
, Answer: 0.5X
◉ At G2 there are 40 chromatids, what is the diploid chromosome
number?
Answer: 20
◉ At G2 there are 40 chromatids, at Telophase II each daughter cells
has how many chromosomes?
Answer: 10
◉ At G2, there are 40 centrosomes, at Telophase II each daughter
cell has how many chromosomes?
Answer: 20
◉ Why don't we talk about Gossian genetics?
Answer: he was not quantitative with his work
◉ What is the alternative form of a gene?
Answer: allele
◉ How many different alleles can a diploid individual have at a
single gene locus if there are 4 alleles in the population?
Answer: 2 alleles
