Answer:
D) presence of transcription activators or repressors
Explanation:
The reason why this is not post-transcriptional regulation is that activators actually start the process of transcription by binding to specific sites. while on contrary when repressor binds it halt the process.
For example, there is a protein called CAP which in the presence of cAMP bind with promoter region and enhances the activity of RNA polymerase . While in the absence of cAMP it can not bind to promoter hence the transcription stooped.
Answer:
Codominant and multiple alleles
Explanation:
Human blood types are an example of codominance, because both A and B alleles are expressed equally.
It cannot be complete dominance because neither the A or B allele are expressed over the other. I.e., neither are recessive.
It is not polygenic, as A B and O are multiple alleles of the same gene. Polygenic is when several genes control one trait. Therefore, it also represents a case of multiple alleles.
Sex linked traits are those present on the X chromosome, and we are told here that the gene is found on chromosome 9. Therefore it cannot be sex linked.
Incomplete dominance and codominance are similar but have different outcomes. instead of both alleles being expressed as in codominance, the resulting heterozygous phenotype is a 'blended' phenotype that is distinct from either homozygote. E.g. a red flower mated with a white flower producing pink flowers
Answer:
Anaphase II
Explanation:
Meiosis is one of the forms of cellular repoduction, it has 4 stages of division, prophase, metaphase, anaphase, and telophase, in the prophase and metaphase, the cell is getting ready to the division, and after that in the Anaphase the division of the cromosomes start, once all is arranged in the Anaphase II centromeres split and sister chromatids migrate to opposite poles giving the opportunity to the cell split to happen in the Telophase.
The immune system helps guard against infection, protect from UV radiation, and regulate body temperature.
