The Question Refers to the Following Table, Which Compares the Percent

question 28

Multiple Choice

The question refers to the following table, which compares the percent sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (for example, Intron I is the one closest to the promoter) . The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A.
% Sequence Homology
$$\begin{array} { | l | l | l | l | l| } \hline \text { Species } & \text { Intron I } & \text { Exon I } & \text { Intron VI } & \text { Exon V } \\\hline \text { A } & 100 \% & 100 \% & 100 \% & 100 \% \\\hline B & 98 \% & 99 \% & 82 \% & 96 \% \\\hline \mathrm { C } & 98 \% & 99 \% & 89 \% & 96 \% \\\hline \mathrm { D } & 99 \% & 99 \% & 92 \% & 97 \% \\\hline \mathrm { E } & 98 \% & 99 \% & 80 \% & 94 \% \\\hline\end{array}$$
Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock?

• A) Intron I
• B) Exon I
• C) Intron VI
• D) Exon V

Comprehend how x-rays interact with different tissue densities.

Define mass and understand its measurement in objects.

Explain the concept of isotopes and their characteristics.

Understand electron behavior in bonding and its impact on chemical properties.

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Definitions:

Distribution

The way in which data points are spread out or distributed across various values.

Discrete

Refers to a type of quantitative variable that can assume a countable number of distinct values, often representing categories or counts.

Random Variable

A random phenomenon's numerical outcomes manifested in a variable.

Discrete Random

Refers to a type of random variable that can take on a countable number of distinct values, such as whole numbers, but not fractions.