An amino acid is synthesized by the prokaryote, e. coli. the genes for the enzymes are responsible for synthesizing this amino acid are encoded in an operon. the operon is regulated by a reperssor. when the amino acid binds to the repressor, the repressor changes shape so it can bind to the operator. which of the following statements is true?
a. when levels of the amino acid are high, it binds to the repressor, allowing synthesis of this amino acid to proceed.
b. when levels of the amino acid are low, it binds to the repressor, allowing synthesis of this amino to proceed.

Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?

One of the purposes of transcription is to produce a sequence of bases that

The cluster of developing cells from conception until birth is called an