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bogdanovich [222]
3 years ago
5

Phylogenetic trees ________.

Biology
1 answer:
nirvana33 [79]3 years ago
7 0

B is the correct answer. They can sometimes show an extinction but not always.

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Prader-Willi syndrome is a genetic disorder involving a partial deletion of chromosome 15q on the paternal chromosome. When both
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Answer:

genomic imprinting

Explanation:

Genomic imprinting is a mechanism for regulating gene expression that allows expression of only one of the parental alleles, although both alleles are functional. Unlike most genes in which expression is biallelic, genes that are subjected to this mechanism (imprinted genes) have monoalelic expression; By definition, in an imprinted loci, only one allele is active (maternal or paternal), and the inactive is epigenetically marked by histonic modification and / or methylation of cytosines.

Genomic imprinting can cause some disturbances, among them Prader-Willi syndrome, which is a genetic disorder that involves a partial deletion of chromosome 15q on the paternal chromosome.

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Which chromosomal event in meiosis explains mendel's principle of independent assortment?
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Crossing over? That involves the random exchange of chromosomes. 
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<h3>1. Hepatitis B </h3><h3>2. Levels of circulating antibodies against a certain antigen.</h3>

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The anser is D) Plastids in roots cells are large and designed to store water for later use.

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