Genetics Answers

If a lacI - bacterium is grown in the presence of the sugar X-gal, a blue dye appears; however, the concentration of X-gal decreases over time. What has happened to the X-gal?

Methods of regulating protein production; by controlling whether or not a protein is made, and by altering the protein that is produced. A) List eight methods for controlling whether or not a protein is made.

In a random mating population of 20000, 16800 individuals are the dominant then how many individuals will be homozygous?

Rough-coated guinea pigs crossed with smooth-coated ones produce only rough-coated offspring. What results would be expected from breeding here offspring with each other?

I want to understand more in this situation, My mom gave birth to our 3rd sibling who is B rh+ and my father's genotype is BO but his blood type is O rh+ and my mom is OO genotype and her blood type is O rh+. Me and my sister has O blood type. Do they need DNA or the baby that was born is not my real sister it has diff father? What's happening? I did a lot of research its confusing and lots of question is not answerable. Can you tell me more, please.. thank you

Write short notes on:
(a) Use of twin studies.
(b) Relation between genetics and intelligence.

Detail the various cell types of Immune System and their roles

Describe the lac operon and how it controls the metabolism of lactose. Support
your answer with clear and well labelled diagrams

With the help of clear and labelled diagrams describe the composition and
structure of the nucleosome.

Draw a short segment of a single polynucleotide strand, including at least three
nucleotides. Indicate the polarity of the strand by identifying the 5' end and the 3'
end.