How can a gene be longer than an mRNA produced by that gene? For instance, the gene for Duchenne muscular dystrophy (DMD) is over 2000 kb (kb = kilobases) long, but the mRNA that this gene produces and that is found in polyribosomes is approximately 14 kb long. What causes this discrepancy?

What will the approximate population be in the late summer of 2008?

Use this information to answer the next two questions. You have a rock whose 40K:40Ar ratio is 3.125:96.875. The half-life for the decay in this rock is 1.3 billion years.

Cystic fibrosis is a genetic disorder in homozygous recessives that causes death during the teenage years. If 4 in 10,000 newborn babies have the disease, what are the expected frequencies of the dominant (A1) and recessive (A2) alleles according to the Hardy-Weinberg model?

What is the best statement to summarize the overall conclusion communicated in the graph?

This experimental data is a good example demonstrating what evolutionary mechanism?

Use this information to answer the next two questions. A population of a species of butterfly that mimics the wing color pattern of a monarch is growing at an annual rate of 12%. In August 2004, the population of this species in a certain locale was estimated to be 14,000.

What is the sequence of the first 20 nucleotides of mRNA produced from this gene?

An individual that is AaBb is crossed with an individual that is AaBB. What is the probability of them having a child that is aabb?

What is the amino acid sequence of the protein produced from the mRNA?