Male cats only have one X chromosome. This means they can only express the color associated with that single X chromosome, whether it is the orange color or a non-orange color, but not both. In contrast, female cats have two X chromosomes, allowing them to express both colors simultaneously if they inherit genes for both orange and non-orange fur.
Why are male cats unable to express both orange and non-orange colors simultaneously in the same way as female cats?(1 point)
Responses
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male cats have a dominant Y chromosome
male cats have a dominant Y chromosome - no response given
male cats only have one X chromosome
male cats only have one X chromosome - no response given
only female cats inherit orange genes
only female cats inherit orange genes - incorrect
only female cats inherit non-orange genes
9 answers
Which statement is false?(1 point)
Responses
Chromosomes contain RNA only.
Chromosomes contain RNA only.
Chromosomes contain the genetic code of an organism.
Chromosomes contain the genetic code of an organism.
One chromosome can contain thousands of genes.
One chromosome can contain thousands of genes.
Chromosomes are located in the nucleus of eukaryotic cells.
Responses
Chromosomes contain RNA only.
Chromosomes contain RNA only.
Chromosomes contain the genetic code of an organism.
Chromosomes contain the genetic code of an organism.
One chromosome can contain thousands of genes.
One chromosome can contain thousands of genes.
Chromosomes are located in the nucleus of eukaryotic cells.
The false statement is: Chromosomes contain RNA only.
Chromosomes primarily contain DNA, which carries the genetic code of an organism. While RNA is involved in gene expression and can be found in the cell, it is not a component of chromosomes themselves.
Use the simulation to answer the question.
Gene Expression Essentials
What has a greater influence on protein levels?
(1 point)
Responses
Polymerase affinity has a greater influence because mRNA cannot be translated into proteins without it.
Polymerase affinity has a greater influence because mRNA cannot be translated into proteins without it.
Polymerase affinity has a greater influence because you cannot start reading mRNA without it.
Polymerase affinity has a greater influence because you cannot start reading mRNA without it.
Positive transcription factor affinity has a greater influence because you cannot turn genes on without it.
Positive transcription factor affinity has a greater influence because you cannot turn genes on without it.
Positive transcription factor affinity has a greater influence because you cannot start reading mRNA without it.
Gene Expression Essentials
What has a greater influence on protein levels?
(1 point)
Responses
Polymerase affinity has a greater influence because mRNA cannot be translated into proteins without it.
Polymerase affinity has a greater influence because mRNA cannot be translated into proteins without it.
Polymerase affinity has a greater influence because you cannot start reading mRNA without it.
Polymerase affinity has a greater influence because you cannot start reading mRNA without it.
Positive transcription factor affinity has a greater influence because you cannot turn genes on without it.
Positive transcription factor affinity has a greater influence because you cannot turn genes on without it.
Positive transcription factor affinity has a greater influence because you cannot start reading mRNA without it.
The correct response is: Positive transcription factor affinity has a greater influence because you cannot turn genes on without it.
While polymerase affinity is important for the transcription process, positive transcription factors are essential for initiating and regulating the expression of specific genes. Without these factors, the RNA polymerase cannot effectively bind to the promoter and start transcription, ultimately influencing the levels of protein produced.
A normal allele for a gene has more base pairs than the mutated form of the allele. Which type of mutation occurred?(1 point)
Responses
base pair deletion
base pair deletion
base pair insertion
base pair insertion
base pair separation
base pair separation
base pair substitution
Responses
base pair deletion
base pair deletion
base pair insertion
base pair insertion
base pair separation
base pair separation
base pair substitution
The type of mutation that occurred is a base pair deletion. This is because the normal allele has more base pairs than the mutated form, indicating that some base pairs were deleted from the mutated allele.
A DNA codon that codes for a certain protein undergoes a substitution mutation. The new codon codes for the same amino acid as the original codon. What is the most likely effect of the mutation?(1 point)
Responses
The mutated codon prevents the protein from forming and causes a disease.
The mutated codon prevents the protein from forming and causes a disease.
The mutated codon produces the same protein as the original codon and does not cause a disease.
The mutated codon produces the same protein as the original codon and does not cause a disease.
The mutated codon produces a protein with the same amino acid sequence as the original codon and causes a disease because the protein does not function properly.
The mutated codon produces a protein with the same amino acid sequence as the original codon and causes a disease because the protein does not function properly.
The mutated codon produces a different protein than the original codon and causes a disease because the protein does not function properly.
Responses
The mutated codon prevents the protein from forming and causes a disease.
The mutated codon prevents the protein from forming and causes a disease.
The mutated codon produces the same protein as the original codon and does not cause a disease.
The mutated codon produces the same protein as the original codon and does not cause a disease.
The mutated codon produces a protein with the same amino acid sequence as the original codon and causes a disease because the protein does not function properly.
The mutated codon produces a protein with the same amino acid sequence as the original codon and causes a disease because the protein does not function properly.
The mutated codon produces a different protein than the original codon and causes a disease because the protein does not function properly.
The most likely effect of the mutation is: The mutated codon produces the same protein as the original codon and does not cause a disease.
Since the new codon codes for the same amino acid as the original codon, it is referred to as a "silent mutation." This type of mutation does not change the amino acid sequence of the protein, and therefore, it is unlikely to affect protein function or cause a disease.
5 answers