13 Jun AGRY 320 – A sample of double-stranded DNA contains 35% guanine
Question
16 AGRY 320, Genetics, Homework 1 40 Points
NAME:
Answer the following questions. Due Thursday, June 18 at the beginning of class.
1.
A sample of double-stranded DNA contains 35% guanine. What is the percentage of the other
nucleotides? Show your work.
2. Is the following statement true, why or why not?
‘Mutations are mismatched base pairs that are corrected by DNA polymerases’.
3. Which statement(s) best describe(s) Figure 1-23?
a) Tibetans have evolved a different genome from Han Chinese.
b) There is a gene on chromosome 2 and it’s phenotype is 9 more RBCs.
c) There is a SNP on chromosome 2 and a smaller percentage of Han Chinese have it.
d) The human genome is a beautiful rainbow.
e) Women have the variant EPAS1, whereas men do not.
4. Define the terms gene, allele, and chromosome and explain how they relate to one another,
your definitions of each term should include the role of DNA.
5. How are primers involved in the replication of DNA?
6. List the steps of eukaryotic replication and describe in your own words why it happens and
what the outcomes are, including chromatin and polarity.
7. How many hydrogen bonds and phosphodiester bonds are in this strand of DNA and its
complementary strand? Show your work.
ATCCGCACTAT
8. Answer true or false for the following statements about YOUR genome, disregarding mutations
or sex chromosomes:
____ in your muscle cells there are more muscle-specific genes and in your brain cells there
are more brain-specific genes
AGRY 320, Genetics, Syllabus
2
____ consider a specific, single, nuclear chromosome that is one member of a pair of
homologs: that chromosome has genes from your mother PLUS genes from your father
____ your genome absorbs genes from the food you eat
____ your genome is identical in every cell in your body
____ on homologous chromosomes the genes are in the same order
____ your nuclear genome is identical in sequence to your siblings
____ consider a pair of homologs: they have the exact same nucleotide sequence
____ each chromosome has two strands of DNA and they have a complementary nucleotide
sequence
____ your genes are in the same order in your genome as Hillary Clinton
____ within a given cell in your body, your genome is constantly being replicated in order for
genes to be expressed
____ you have the same number of chromosomes as Donald Trump
____ half of your nuclear DNA came from your mother and half came from your father
____ over time, natural selection changes the genome of an individual
This syllabus is subject to change.
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