Which of the following describes mutations? Select True or False for each statement.T/F Point mutations can occur in any DNA sequence.T/F Frameshift mutations can occur in any DNA sequence.T/F Neutral mutations depend on the degeneracy of the genetic code.T/F Deleterious mutations occur only in protein-coding sequences of DNA.

A geneticist found that a particular mutation had no effect on the polypeptide encoded by a gene. This mutation probably involveda. deletion of one nucleotide.b. alteration of the start codon.c. insertion of one nucleotide.d. substitution of one nucleotide.

If a fragment of a chromosome breaks off and then reattaches to the original chromosome but in the reverse direction, the resulting chromosomal abnormality is calleda. a deletion.b. an inversion.c. a translocation.d. a nondisjunction.

Imagine discovering a loss-of-function mutation in a eukaryotic gene. You determine the gene's nucleotide sequence from the start site for transcription to the termination point of transcription and find no differences from the wild-type sequence. Explain where you think the mutation might be and how the mutation might be acting.

Which of the following mutations would be most likely to have a harmful effect on an organism?a. a deletion of three nucleotides near the middle of a geneb. a single nucleotide deletion in the middle of an intronc. a single nucleotide deletion near the end of the coding sequenced. a single nucleotide insertion downstream of, and close to, the start of the coding sequence

Which of the following describes mutations? Select True or False for each statement.T/F Point mutations can occur in any DNA sequence.T/F Frameshift mutations can occur in any DNA sequence.T/F Neutral mutations depend on the degeneracy of the genetic code.T/F Deleterious mutations occur only in protein-coding sequences of DNA.

Explain what's wrong with this statement: All point mutations change the genotype and the phenotype.

Explain what's wrong with this statement: All point mutations change the genotype and the phenotype.

Skin color is often one of the first traits people notice in each other. Studies in zebrafish uncovered a mutation that altered a transport protein and resulted in light-colored fish. This discovery led to the finding that the same gene in humans has a strong influence on skin pigmentation in many populations. The zebrafish mutation that reduced coloration created a null allele of the transport protein gene. Which of the following types of mutation would be most likely to create this null allele?a. a missense mutationb. a frameshift mutationc. a neutral mutationd. a silent mutation