Final Exam Practice HW #1

What molecule is a "working copy" of the DNA instructions?

• tRNA
• mRNA
• rRNA
• dRNA

What do we call the 3-base sequence on mRNA that codes for an amino acid?

• anticodon
• base code
• codon
• polypeptide

Transcription is the process that makes...?

• proteins
• mRNA

If a sample of DNA has 50 bases of thymine, what other base will there also be 50 of?

• cytosine
• guanine
• uracil
• adenine

how many chromosomes are in human sex cells?

• 23
• 46
• 92

This process creates offspring genetically identical to the parent organism?

• selective breeding
• artificial selection
• cloning
• natural selection

Which process is more technology based?

• genetic engineering
• selective breeding

For woman with X-linked recessive disorders, which individual would express the disorder?

• one copy of the allele on her X
• one copy of the allele on her Y
• one copy of the allele on each x
• no copies of the allele

Is this individual a male or female?

• male
• female

What are the chances that parents that are both heterozygous for a trait will have a child showing the recessive phenotype?

• 0%
• 25%
• 50%
• 75%