Blog

In a controlled experiment, typically only one factor is intentionally changed between the experimental treatment and the control treatment. What factor is changed?

Alleles are alternate versions of [same] gene(s) that can result in [phenotypes].

In 2000, the artist Eduardo Kac unveiled his bio-engineered art piece named “Alba,” a transgenic rabbit created using transformation. Alba’s cells carried a gene derived from jellyfish that produces GFP, a green fluorescent protein. When Alba was illuminated with UV light, she fluoresced a bright lime green color. To create Alba, genetic engineers had to first create a/an recombinant DNA vector that consisted of a jellyfish [coding] gene that produced GFP and a rabbit [regulatory] gene. This vector was then inserted into the genome of the embryo that ultimately developed into Alba.

The “ABO” blood group in humans is characterized by a single gene with three alleles: A, B, and O.  A and B are co-dominant with each other, while O is recessive to both A and B. These allelic interactions give rise to four possible phenotypes: type A, B, O, or AB blood. Given the allelic interactions described above, some phenotypes can result from more than one genotype (e.g., the genotypes AO and AA both result in type A blood). Suppose a woman with type O blood gives birth. After taking her child home from the hospital, she discovers the child has the following phenotype: type AB blood. Given both the mother and child’s phenotypes, which of the following conclusions is correct?

Which of the following processes generates new genetic variation in a population?

Which of the following processes occurs in meiosis but NOT in mitosis?

A mutation in a single gene in mice leads to a wide range of effects, including changes in fur color, bone structure, and immune function. This phenomenon, where one gene influences multiple traits, is known as:

You have identified the mutation in a p53 gene responsible for an aggressive type of lung cancer. The mutation is highlighted in red and underlined in the DNA sequence data below.  What type of mutation is it? [answer1] What change does the mutation cause? [answer2] Normal p53 Sequence: 3′ – AATGCAAAACCATTGCCA – 5’Mutant p53 Sequence: 3′ – AATGCAAATCCATTGCCA – 5′

Red-green color blindness in humans is inherited as a recessive X-linked trait. The allele for normal vision is B, and the allele for colorblindness is b. A husband and wife have 2 sons and 2 daughters. One son and one daughter are color blind. What are the genotypes of the parents?

Each messenger RNA (mRNA) codon corresponds to…