Genetics practice questions exam 3

The nucleotide sequence of the RNA produced during transcription is identical to the nucleotide sequence of the corresponding DNA coding strand except that…

U will replace T

A codon that specifies the amino acid Ile undergoes a single-base substitution to become the amino acid Met. Which of the following describes the type of mutation that must have occurred?

a transition mutation or a transversion mutation at the third position of the codon

The following nucleotide sequence is found in a short stretch of DNA:

5' TGCC 3'

Suppose a depurination event occurred within the top strand. If this mutant strand were used as a template for replication, what is the MOST likely sequence of the newly synthesized strand?

3' AAGG 5'

Two chromosomes have the following segments, where · represents the centromere:

K L M · N O P Q R S T U V · W X Y Z

What type of chromosome mutation would result in the following chromosomes?

K L M · N O P Q R S T X Y U V · W X Y Z

displaced duplication

The researchers concluded that two Alu sequences (AluY and AluSx1) played a role in the loss of the tail during the evolution of apes. List two differences between the AluY element and the AluSx1 element.

Which model organism did the authors use in the course of their experiments?

mice

T/F: Humans normally express two isoforms of TBXT - a full-length version and a version lacking exon 6.

true