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Olin [163]
3 years ago
5

Huntington's disease (hd) is a neurodegenerative genetic disorder involving an autosomal dominant mutant allele with high penetr

ance. if a father's mother had hd, what is the probability that his first child will also have hd?
Biology
1 answer:
Effectus [21]3 years ago
4 0

100% the child will also have HD, as HD is caused by the DOMINANT mutant allele. 4/4

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<em>1. Oblong cells with unevenly thickened walls for support in young stems  →</em>

<em>Collenchyma </em><em>.</em>

<em>2. a waxy substance covering most surface areas of plants; helps to retain water  → </em><em>Cuticle</em><em>. </em>

<em>3. The youthful, undifferentiated cells of root and shoot tips and other plant parts that produce new cells for growth  → </em><em>Meristem </em><em>.</em>

<em>4. The most common plant cell, found in practically all parts of the plant body; important for food production, food storage, lateral transport, and other life processes; an almost round cell in some tissues  → </em><em>Parenchyma</em><em> .</em>

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<em>This all refers to tissues found in plant organisms.</em>

  • In plants, the colenchyma is a supporting tissue, composed mainly of elongated, irregularly walled living cells with a large amount of cellulose. Their composition and the way they are arranged - with longitudinal interlacing - give the tissue strength and resistance. It represents one of the three basic tissues of plants.
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  • Periderm constitutes the outer coating of a plant or bark, functionally replacing the epidermis. This tissue is located after the secondary phloem, and is composed of cork, specifically phellem, phellogen and phelloderm.
  • Plasmodesmata are a type of microscopic channel that crosses the plant wall, being a link for intercellular communication, as well as the transport of nutrients.

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