Genetics Answers

In the two potatoes fields (A and B) we used same amount of insecticide against colorado beetles. Results showed that in field A all colorado beetles died neverthless in field B after some time population grown up again. Why this is directional selection type?

Part of one strand of a DNA molecule was found to have the following base sequence; G-T-C-A-G-T What is the sequence on m-RNA strand copied from this DNA portion?

. A brown-eyed man marries a blue-eyed woman, and they have eight brown-eyed children. What are the genotypes of all the individuals in the family?

How many F2 phenotypes Will be produced from the parental cross AABBCC x AABBCC?( Prove your answer using the crosses)

In a diploid cell undergoing mitosis, the centromeres of the chromosomes will
a. replicate during prophase.
b. divide when chromosomes are synapsing.
c. segregate to the same pole of the cell during anaphase.
d. divide in the reductional division. e. attach to spindle fibres.
explain why each of the incorrect statements is eliminated.

Lamin A codes for a protein required for the structural support of the nuclear envelope in cells. Without a functional protein, the nuclear envelope becomes unstable, eventually damaging the nucleus and causing cells to die. Based on what you learned in this Click & Learn, propose a genetic medicine strategy you could develop to treat patients with progeria. Describe which step in gene expression you might target and why you would target that step, the intervention tool you would use, and explain how this strategy would treat the disease.

Warm up:

Look over the images below and create a list of similarities and differences that you find. You must have at least 3 of each

Discuss how crossing-over leads to greater variability of phenotypes. Give an example to help explain your answer.

If you are assuming that there is the accumulation one mutation in every 10 DNA bases every 100,000 years, how long would you predict it has been since the divergence of E. coli and Anabaena?

What is crossing over in meiosis and what is the purpose of it?