Exam 3 Review

Genotype refers to:

• physical expression of the genes.

• the possible combination of alleles.

• whether an allele is dominant or recessive.

• how an organism will appear.

Which of the following is a phenotype?

• BB
• Bb
• bb
• Blue eyes

Tags

NGSS.MS-LS4-4

The only way to have a recessive trait is to be:

• Homozygous recessive

• Heterozygous

• Homozygous dominant

Which of the following genotypes shows a heterozygote?

• BB

• Bb

• bb

What can you infer about this individual?

• This is a human female with a missing X chromosome.

• This is a human male with Down syndrome.

• This male is missing a chromosome.

• This human female has a type of aneuploidy called trisomy.

Why does transcription have to occur? In other words, why does DNA have to copy its code into mRNA?

• DNA cannot leave the nucleus, so it must copy its code into a molecule than can leave the nucleus.

• DNA is negatively charged, which means it cannot bypass hydrophobicity of the cell membrane.

• tRNA has to know where to bring the ribosome, so the DNA must copy its genetic code.

• mRNA gets bored in the cell, so it commonly travels into the nucleus to copy tRNA's code to pass the time.

Proteins are made up of _________, which are transported to the ribosome by _____.

• amino acids; tRNA

• amino acids; mRNA

• nucleotides; tRNA

• nucleotides; mRNA

Tags

NGSS.HS-LS1-1

The type of ribonucleic acid that is responsible for copying the code found in DNA and bringing it out of the nucleus is called:

• tRNA

• mRNA

• rRNA

• dRNA

A string of nucleotides that contain the information on how to construct a specific protein is called a:

• Ribose

• Amino Acids

• tRNA

• Gene

Tags

NGSS.HS-LS1-1

During translation, _____ is responsible for delivering amino acids to help make a protein.

• mRNA

• rRNA

• tRNA

• dRNA