A farmer noticed that two of her cotton plants produce cotton with a slight greenish hue. By repeatedly crossing the greenish plants, she has produced a variety of deep-green cotton without the use of any dyes. This is an example of:

If the allele for inflated pea pods (I) is dominant to the allele for constricted pods (i), then the cross Ii x ii is expected to produce: 

DNA replication is controlled by enzymes. 1)____________“unzips” the double helix by breaking hydrogen bonds, 2)___________ adds new nitrogenous bases to the exposed single strands, and 3) ____________ bonds short sequences together that are formed from the lagging strand (the strand that is “read” in the opposite direction).

If a bacterial protein is made from 30 amino acids, how many nucleotides are needed to code for its production? 

In the karyotype of a person with Down syndrome, or trisomy 21, an extra copy of chromosome 21 is apparent. This abnormality affects roughly 1 of every 700 children born and is the most common serious birth defect in the United States. People affected by Down syndrome often have cognitive difficulties, heart defects, and shortened life spans. Based on this scenario and your understanding of meiosis, what is the most likely explanation for the extra chromosome 21 in people with Down syndrome? 

In a typical human body (somatic cell, how many total chromosomes are there? 

All of the following may be found in a DNA nucleotide EXCEPT: 

If the DNA of a certain organism has guanine as 30% of its bases, then what percentage of its bases are adenine? 

If meiosis did NOT occur in sexually reproducing organisms: 

A cell with 10 chromosomes undergoes mitosis and complete cell division. How many daughter cells are produced, and what number of chromosomes do they have?