Biology Answers

A researcher has two pure breeding strains of fruit flies: strain A and strain B.

Strain A produces only enzyme A and strain B only enzyme B. The alleles

coding for enzyme A and enzyme B are the only alleles involved here and occur at the

same locus. The researcher crossed a fly from strain A with one from strain B and found

that all the offspring (F1 generation) could produce both enzyme A and enzyme B. When he

crossed two of the F1 generation flies, he found the following in the offspring:

658 produced enzyme A, 1364 produced enzyme A and B, 581 produced enzyme B

What type of inheritance can produce these results? Using appropriate symbols, show the

researcher’s cross (up to the F2 generation) What would the expected result be if one of the

offspring that can produce both enzyme A and enzyme B were crossed with one that can only

produce enzyme A (include a Punnett Square)?

10 Marks

A herpetologist finds an anuran which has a green hue. This is the dominant

colour trait and therefore the genotype for colour can be either homozygous

(GG) or heterozygous (Gg). In this species of frog body colour that is brown

suggests a recessive phenotype and therefore this genotype would have to be

homozygous for the recessive allele (gg). G represents the dominant allele and g represents the

recessive allele. Using selective breeding techniques, how would the researcher determine the

genotype of the original green anuran? Explain how the results of this would help the researcher

identify the genotype or the original green anuran.

describe the three parts of RNA

Neurons send ____ in response to stimuli. 

List the potential errors that could have affected the results of this heart rate and blood pressure practical and how you would reduce them if the same practical was repeated? ( 100 words please)

To determine whether observed mean blood Vitamin B12 levels are elevated in a non-fasting state compared to a fasting state, the researchers recruited 20 participants. Each of the participants had their Vitamin B12 levels checked twice. On Day 1, Vitamin B12 levels were measured after fasting for 8 hours. On Day 2, Vitamin B12 levels were measured without prior fasting. Answer this research question using the 1% level of significance. what formula will be applied?

Explain what will happen if n alien intervention somehow removes hydrogen bonding from sea water and you are sailing a ship in Atlantic ocean?

Structure of assignment/report: Discuss with the presenter the following aspects: 1. Types of food items processed. 2. Different types of tests conducted (conventional or molecular) in the facility, purposes, and limitations of these methods. 3. How to control infections and prevent them. 4. Infections are usually encountered/tested. 5. Treatments if needed/applicable

you are told that cells on a microscope slide are plant,animal, or bacerial. you look through a microscope and see cell walls and menbrane bound organelle. you conclude that the cells

Which pigment is present in jaundiced patient: a. Bilirubin b. Urobilinogen c. Stercobilin d. Both a and b