Semester 2 Exam

Which organelle is DNA usually found in?

• cell membrane

• vacuole

• ribosome

• nucleus

Scientists have introduced a gene from another organism (like a jellyfish gene) to the DNA of these organisms that causes them to glow. This is an example of what kind of biotechnology?

• artificial selection

• genetic engineering

• cloning

DNA is a polymer made of nucleotides. What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base

• sugar, oxygen, nitrogen base

• sugar, phosphate, nitrogen base

• sugar, phosphate, protein

Which of the following is a phenotype?

• scar

• red hair

• heterozygous

• DNA

Put the parts of the cell in order from largest to smallest.

• cell, nucleus, chromosomes, DNA, gene, allele

• gene, DNA, chromosomes, nucleus, cell, allele

• cell, chromosomes, nucleus, DNA, gene, allele

• nucleus, chromosomes, DNA, allele, gene

Given these 2 alleles: B = brown fur & b = white fur, what is the probability for white fur? Refer to the Punnett Square.

Hint: there are 4 squares @ 100% and if you associate it with money there are 4 quarters in 1 dollar which is 100 pennies or 100% of the dollar.

So, each square or quarter of the Punnett Square is worth 25% of the 100%.

• 0%

• 25%

• 50%

• 75%

In the Punnett Square shown, what are the genotypes (pair of alleles) from each of the two parents?

• RW and RR

• RW and WW

• RR and WW

• RW and RR

Referring to generation 1: What is the allele combination for the dominant homozygous parent?

Hint: both hetero and homo word parts originated from the Greek Language; hetero means "the other of two" and homo means the same.

• PP

• Pp

• pp

Referring to generation 1: What is the allele combination aka genotype for the recessive homozygous parent?

Hint: both hetero and homo word parts originated from the Greek Language; hetero means "the other of two" and homo means the same.

• PP

• Pp

• pp

Guanine bonds with ______________.

• Adenine

• Guanine

• Cytosine

• Thymine