Biology
If a chromosome fragment breaks off and is lost from the original chromosome, the resulting chromosomal abnormality is called an) __________.
| [removed] | deletion |
| [removed] | inversion |
| [removed] | translocation |
| [removed] | nondisjunction |
| [removed] | reciprocal translocation |
Question
9 of 45
If short hair L) is dominant to long hair l), animals LL and Ll have the same __________.
| [removed] | genotypes |
| [removed] | phenotypes |
| [removed] | alleles |
| [removed] | genes |
| [removed] | chromatids |
Question
10 of 45
One of Mendel’s defining ideas was the theory of segregation. This idea __________.
| [removed] | deals with the alleles governing two different traits |
| [removed] | applies only to linked genes |
| [removed] | applies only to sex-linked genes |
| [removed] | explains the behavior of a pair of alleles during meiosis |
| [removed] | applies to the partitioning of proteins |
Question
11 of 45
If short hair L) is dominant to long hair l), then what fraction of the offspring produced by a cross of Ll x ll will be homozygous dominant?
| [removed] | 1/2 |
| [removed] | 1/4 |
| [removed] | 1/3 |
| [removed] | 1/8 |
| [removed] | None |
Question
12 of 45
If a child belonged to blood Type O, he or she could NOT have been produced by which set of parents?
| [removed] | Type A mother and Type B father |
| [removed] | Type A mother and Type O father |
| [removed] | Type AB mother and Type O father |
| [removed] | Type O mother and Type O father |
| [removed] | Type B mother and Type O father |
Question
13 of 45
Amniocentesis involves sampling __________.
| [removed] | the fetus directly |
| [removed] | the fetal cells floating in the amniotic fluid |
| [removed] | sperm |
| [removed] | blood cells |
| [removed] | urine |
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14 of 45
Which of the following genotypes is said to be homozygous?
| [removed] | AaBB |
| [removed] | aaBB |
| [removed] | aaBb |
| [removed] | aABB |
| [removed] | Aabb |
Question
15 of 45
Which of the following is NOT a true statement about genes?
| [removed] | Genes are located on chromosomes. |
| [removed] | Genes are inherited independently of the chromosomes. |
| [removed] | Genes are arranged in linear sequence on chromosomes. |
| [removed] | A gene is a discrete sequence of DNA on a chromosome. |
| [removed] | Genes code for proteins. |
Question
16 of 45
A karyotype __________.
| [removed] | compares one set of chromosomes to another |
| [removed] | is a visual display of chromosomes arranged according to size |
| [removed] | is a photograph of cells undergoing mitosis during anaphase |
| [removed] | of a normal human cell shows 48 chromosomes |
| [removed] | is a representation of a cell in apoptosis |
Question
17 of 45
A woman heterozygous for colorblindness an X-linked recessive allele marries a man with normal color vision. What is the probability that their first child will be colorblind?
| [removed] | 25 percent |
| [removed] | 50 percent |
| [removed] | 75 percent |
| [removed] | 100 percent |
| [removed] | 0 percent |
Question
18 of 45
What could the children of a colorblind woman and a man with normal vision be?
| [removed] | All will be colorblind. |
| [removed] | None will be colorblind. |
| [removed] | Daughters will be color-blind and sons will be of normal vision. |
| [removed] | Sons will be colorblind and daughters will be of normal vision. |
| [removed] | Half of the sons will be colorblind and all daughters will be colorblind. |
Question
19 of 45
DNA replication __________.
| [removed] | occurs by the addition of nucleotides to the end of the DNA molecule |
| [removed] | results in the formation of four new DNA strands |
| [removed] | produces two daughter DNA molecules that are complementary to each other |
| [removed] | uses each strand of a DNA molecule as a template for the creation of a new strand |
| [removed] | begins when two DNA molecules join together to exchange segments |
Question
20 of 45
If one strand of DNA is CGGTAC, the corresponding strand would be __________.
| [removed] | GCCTAG |
| [removed] | CGGTAC |
| [removed] | GCCAUC |
| [removed] | TAACGT |
| [removed] | GCCATG |
Question
21 of 45
Which one of the following sequences best describes the flow of information when a gene directs the synthesis of a cellular component?
| [removed] | RNA ? DNA ? RNA ? protein |
| [removed] | DNA ? RNA ? protein |
| [removed] | protein ? RNA ? DNA |
| [removed] | DNA ? amino acid ? RNA ? protein |
| [removed] | DNA ? tRNA ? mRNA ? protein |
Question
22 of 45
Which one of the following best describes the sequence of events of translation?
| [removed] | codon recognition ? translocation ? peptide bond formation ? termination |
| [removed] | peptide bond formation ? codon recognition ? translocation ? termination |
| [removed] | codon recognition ? peptide bond formation ? translocation ? termination |
| [removed] | codon recognition ? peptide bond formation ? termination ? translocation |
| [removed] | peptide bond formation ? translocation ? codon recognition ? termination |
Question
23 of 45
In DNA, correct complementary base pairing would occur between __________.
| [removed] | cytosine and uracil |
| [removed] | adenine and guanine |
| [removed] | adenine and uracil |
| [removed] | adenine and thymine |
| [removed] | cytosine and adenine |
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24 of 45
Which of the following is NOT true of DNA polymerase?
| [removed] | Adds new nucleotides to a developing strand. |
| [removed] | Is an enzyme. |
| [removed] | Creates the energy it needs by breaking adenine-guanine bonds. |
| [removed] | Proofreads DNA strands to see that they are correct. |
| [removed] | Is a protein. |
Question
25 of 45
The movement of DNA fragments in a gel electrophoresis experiment is based on __________.
| [removed] | the amount of carbon in the fragment |
| [removed] | the size and charge of the molecules |
| [removed] | the number of organic rings in the fragment |
| [removed] | their ease in going into a salt solution |
| [removed] | the sugars in the fragment |