Genetics Answers

Explain why in tested field medium height's wheat grown the most intensively?(2 arguments)

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.

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

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

What is removed from pyruvate during its conversion into an acetyl group during the first step of glycolysis