The following questions refer to the information below.
A researcher compared the nucleotide sequences of a homologous gene from five different species of mammals with the homologous human gene. The sequence homology between each species' version of the gene and the human gene is presented as a percentage of similarity.
$$\begin{array} { l c }
\text { Species } & \text { Percentage } \
\hline \text { Chimpanzee } & 99.7 \
\text { Orangutan } & 98.6 \
\text { Baboon } & 97.2 \
\text { Rhesus Monkey } & 96.9 \
\text { Rabbit } & 93.7
\end{array}$$

-Concerning growth in genome size over evolutionary time, which of these does not belong with the others?
A)orthologous genes
B)gene duplications
C)paralogous genes
D)gene families

Question

The following questions refer to the information below.
A researcher compared the nucleotide sequences of a homologous gene from five different species of mammals with the homologous human gene. The sequence homology between each species' version of the gene and the human gene is presented as a percentage of similarity.
 $$\begin{array} { l c } 
\text { Species } & \text { Percentage } \
\hline \text { Chimpanzee } & 99.7 \
\text { Orangutan } & 98.6 \
\text { Baboon } & 97.2 \
\text { Rhesus Monkey } & 96.9 \
\text { Rabbit } & 93.7
\end{array}$$

-Concerning growth in genome size over evolutionary time, which of these does not belong with the others?
A)orthologous genes
B)gene duplications
C)paralogous genes
D)gene families

Quizplus · Accepted Answer

Orthologous genes are genes in different species that evolved from a common ancestral gene by speciation, and they do not contribute to growth in genome size. The other options involve gene duplications, which can increase genome size.

The Following Questions Refer to the Information Below -Concerning Growth in Genome Size Over Evolutionary Time, Which of Compared