The arrangement of the autosomes and that of sex chromosomes in the pairs is known as karyotype.
A karyotype test looks at the size, of the shape, and the number of your chromosomes. the Chromosomes are the parts of your cells that has contain your genes. Genes are the parts of the DNA passed down from your mother and the father. They also carry the information that determines your unique traits, such as the height and the eye color.
A karyotype test also examines the blood or the body fluids for the abnormal chromosomes. It's is often used to detect the genetic diseases in unborn babies still the developing in the womb.
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Answer:
False
Explanation:
The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.
Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases). This is the way of gene expression regulation.
The effects of modifications are different, for example methylation promotes condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).
Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.
Answer:
I need a name for my biology team, it's about the relationship of fossils to the theory of evolution.
Explanation:
Where’s the diagram picture I won’t be able to answer if I’m not sure