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Terms in this set (40)
Why is it more practical to prepare karyotypes by viewing somatic diploid cells rather than haploid gametes?
Both sets of chromosomes , which are present in somatic diploid cells, need to be examined.
Which of the following transmits genes from both parents to child, or from one generation of a family to another?
Which of the following is NOT a typical trait of cancerous cells that makes them different from normal somatic cells?
Cancer cells have more effective DNA repair activities.
Which of the following statements about homologous chromosomes is correct?
They carry the same genes for the same traits at the same loci
Privet shrubs and humans each have a diploid number of 46 chromosomes per cell. Why are these two species so dissimilar?
The two species have appreciably different genes.
When a haploid egg cell and a haploid sperm cell combine during fertilization, the resulting diploid cell is called a
Fertilization is to zygote ans meiosis is to
Which of the following is NOT a function of meiosis in humans?
Multiplication of somatic cells
In humans, a cell that contains only 23 chromosomes is
How many maternal chromosomes are present in a somatic human cell in G1?
Both pea plants and fruit flies are easy to breed, quick to breed, and cheap to breed. They also both have easily identifiable traits. This makes them both
The physical and behavioral characteristics of an organism are its
Males are more likely to suffer from X-linked genetic disorders because
males only possess one copy of the X chromosome
The most common traits in a population are known as
wild type traits
The expected phenotypic ratio resulting from a dihybrid cross is
In order for a dominant allele to be expressed
only one copy of it must be present
Alternative versions of genes are called
Suppose there is a gene in a diploid somatic cell called "Gene A" with alleles "A" and "a." Which alleles can be present in a haploid gamete?
Allele "A" or "a" can be in a gamete, but not both.
Which of the following is a pleiotropic gene?
The Sonic the Hedgehog Gene
If you were to measure the height and skin tone of a few thousand people and graph your data, you would see a bell curve. There is a range of human height and skin tones. What sort of inheritance leads to results like that?
During DNA replication, the leading strand is replicated continuously, but the lagging strand is replicated a fragment at a time. What do we call those short fragments?
What is the diameter of a double stranded DNA molecule?
In 1944 Oswald Avery performed an experiment of historical importance. Most biolgists did not believe his results, but what did he conclude?
DNA is the "information molecule"
The nucleotide composition of any DNA molecule consists of adenine molecules and thymine molecules having equal concentrations and guanine and cytosine molecules also having equal concentrations. This concept is known as
Which enzyme is responsible for "unzipping" double stranded DNA resulting in two molecules of single stranded DNA?
In 1928, Frederick Griffith performed a historically important experiment. What did he conclude from his experiment?
That the "information molecule" can be transmitted both vertically and horizontally.
Which enzyme "reads" single stranded DNA in a three prime to five prime direction and "writes" complementary strands in a five prime to three prime direction?
In 1952 Alfred Hershey and Martha Chase performed a historically important experiment. What did they conclude?
Oswald Avery was right; DNA is the "information molecule"
Which two scientists built a model of DNA in 1953 that agreed with previous clues collected by Rosalind Franklin, Erwin Chargaff, and electron microscopy?
James Watson and Francis Crick
Which of the following descriptions of DNA replication is/are accurate?
All three of the descriptions here are accurate.
What enzyme is responsible for "reading" single stranded DNA in a three-prime to five-prime direction and "writing" complementary mRNA strands in a five-prime to three-prime direction?
Consider the following sentence which consistes entirely of three-letter words. THE CAT ATE THE RAT. This sentence conveys meaning. Now imagine the sentence was copied over and over and eventually a letter was omitted such that the sentence reads HEC ATA TET HER AT. This is analogous to a mutation occuring in DNA after many rounds of replication. What kind of a mutation is it analogous to?
A codon is a group of three RNA nucleotides. An A, G, C, or U could be in the first slot, and the second slot, and the third slot. This means there are 4 options for slot one, 4 options for slot two, and four options for slot three. Mathematically, this means there are 64 possible codons. Each codon corresponds to an amino acid. How many amino acids are there?
A gene in a jellyfish cell can be transcribed and translated into a protein. If that gene is removed from a jellyfish cell and inserted into a cell from another species, it will still be transcribed and translated into the same protein. How is this possible?
The genetic code is univeral because all life is descended from a common ancestor
Each group of three nucleotides in an mRNA molecule, starting with the sequence AUG, is known as a
The flow of information from DNA to mRNA is called
The flow of information from mRNA to protein is called
When mRNA molecules are synthesized in eukaryotic cells, they contain regions known as introns and other regions known as exons. What class of molecule is responsible for removing the introns and connecting the exons together as the final mRNA transcript is produced?
Which of the following produces genetic variability?
All of these choices can contribute to genetic variation
In a eukaryotic cell, where does the process of transcription take place?
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