Question

1.
A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa). Which of Mendel’s principles explain(s) why the offspring is albino? (1 point)

dominance only
independent assortment only
dominance and segregation
segregation only

2.
How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY? (1 point)

2
4
8
16

3.
During which process do alleles undergo segregation? (1 point)

DNA replication
mitosis
meiosis
transcription

Answer 1

4.
Gametes have (1 point)

homologous chromosomes.
twice the number of chromosomes found in body cells.
two sets of chromosomes.
one allele for each gene.
6.
The Hershey-Chase experiment proved that DNA was the hereditary material because (1 point)

radioactive phosphorus in viral proteins was shown not to enter bacterial cells.
radioactive phosphorus in viral DNA was shown to enter bacterial cells.
radioactive sulfur in viral proteins was shown to enter bacterial cells.
radioactive sulfur in viral DNA was shown not to enter bacterial cells.

7.
Which of the following is a nucleotide found in DNA? (1 point)

adenine + phosphate group + thymine
cytosine + phosphate group + guanine
deoxyribose + phosphate group + polymerase
deoxyribose + phosphate group + cytosine

8.
How does replication of the lagging strand of DNA compare with replication of the leading strand? (1 point)

The replication process is identical for both strands.
Okazaki fragments are made on the lagging strand but not on the leading strand.
The leading strand is copied in one direction while the lagging strand is copied in the opposite direction.
DNA ligase works on the leading strand while DNA polymerase works on the lagging strand.

9.
How can scientists use DNA in crime scene investigations? (1 point)

They analyze the size of the DNA to determine where a crime was committed.
They analyze the GC content of the DNA to determine how a crime was committed.
They analyze the sequence of bases in the DNA to determine who committed a crime.
They analyze the age of the DNA to determine when a crime was committed.

10.
During eukaryotic transcription, an RNA molecule is formed that is (1 point)

complementary to both strands of DNA.
identical to an entire single strand of DNA.
double-stranded and inside the nucleus.
complementary to part of one strand of DNA.

11.
How many nucleotides are needed to specify three amino acids? (1 point)

3
6
9
12

12.
During translation, the type of amino acid that is added to the growing polypeptide depends on the (1 point)

codon on the mRNA and the anticodon on the rRNA.
anticodon on the mRNA and the anticodon on the tRNA.
anticodon on the rRNA and the codon on the mRNA.
codon on the mRNA and the anticodon on the tRNA.

13.
Which are possible outcomes of a mutation in a gene that codes for a transcription factor? (1 point)

The ability of the transcription factor to bind to DNA may be destroyed.
The ability of the transcription factor to bind to DNA may be reduced.
The ability of the transcription factor to bind to DNA may be unchanged.
Any of the above is possible.

14.
Operons allow prokaryotes to (1 point)

replicate DNA at the appropriate time.
avoid mutations.
keep their DNA organized.
conserve energy.

15.
Which of the following statements describes the central dogma of molecular biology? (1 point)

Biological information in a cell passes from DNA to RNA to proteins.
Biological information in a cell passes from RNA to proteins to DNA.
Biological information in a cell passes from RNA to DNA to proteins.
Biological information in a cell passes from proteins to RNA to DNA.

16.
How many chromosomes are shown in a normal human karyotype? (1 point)

2
23
44
46

17.
How can scientists use the following pedigree?
pedigree chart
(1 point)

to confirm the principle of independent assortment
to confirm the one gene: one protein concept
to study the phenomenon of dominance
to study the inheritance pattern of a sex-linked trait

18.
Which of the following has the disadvantage of possibly bringing two recessive alleles together and causing a genetic defect? (1 point)

inbreeding
hybridization
genetic engineering
transformation

19.
Which of the following is a pair of transgenic organisms? (1 point)

a hybridized peach tree and bacteria that make human insulin
a Bt corn plant and a polyploid banana tree
a hybridized peach tree and a polyploid banana tree
bacteria that make human insulin and a Bt corn plant

20.
Which of the following is a concern about the use of genetically modified plants in growing food? (1 point)

Genetically modified plants may require more pesticides.
Genetically modified plants may not break down normally and cause recycling problems.
Genetically modified plants may be more susceptible to disease.
Genetically modified plants may harm organisms that were never intended to be harmed.

Answer 2

@ParthKohli Can you help?

Answer 3

@sauravshakya @ghazi Can one of you guys help as well?

Answer 4

This looks like a test - if you have specific points you are stuck on please let me know and I'll see what I can do. Otherwise might I suggest some studying? Wikipedia might be a good place to start.

Answer 5

stuck on # 16 please help

Answer 6

does inbreeding or hybridization create recombinant in DNA

Answer 7

do you get the answers