What Is the Best Explanation of a Child Having the Physical

question 20

Multiple Choice

What is the best explanation of a child having the physical phenotype of Down syndrome but having a totally normal karyotype on chromosomal analysis of blood?

• A)Mosaicism of trisomy 21 in various tissues
• B)Inaccurate technique for chromosomal analysis
• C)Uniparental disomy for somatic cells but not for germ cells
• D)Selective chromosome loss during meiosis II of gametogenesis

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Definitions:

Contribution Format Income Statement

An income statement that separates fixed and variable costs to highlight the contribution margin.

Operating Leverage

A measure of how sensitive a company's operating income is to a change in its revenues, indicating the proportion of fixed costs in the company's cost structure.

Contribution Format Income Statement

An income statement format that separates fixed costs from variable costs, thus showing the contribution margin.

Degree of Operating Leverage

A financial ratio that measures the sensitivity of a company's operating income to its sales, indicating how revenue growth translates into growth in operating income.