Bio-10- Mid term- Term- III.

Which of the following is an example of a biological trait?

• personality

• hair style

• eye color

• regional accent

Mendel began his experiments with purebred pea plants. This approach enabled him to determine that variations among offspring were the result of

• random mutations

• self-pollination

• genetic uniformity

• his crossings

When Mendel crossed plants that were purebred purple-flowered with plants that were purebred white-flowered, the resulting offspring all had purple flowers. When allowed to self-pollinate, this F1 generation gave rise to white-flowered plants as well as purple. As a result, Mendel determined that individual traits are

• inherited as discrete units.

• diluted in offspring.

• merged with successive generations.

• lost in the pollination process.

Mendel was able to identify predictable patterns of heredity. He succeeded mainly because he chose to study traits that

• were always dominant.

• tended to be recessive.

• could be diluted.

• had only two forms.

Which of the following conclusions was a result of Mendel’s observations?

• Organisms that give rise to purebreds are genetically superior.

• Organisms that have intermediate features are self-pollinating.

• Organisms inherit two copies of each gene, one from each parent.

• Organisms that self-pollinate do not have “either-or” features.

_____is the study of biological inheritance patterns and variation.

• Traits

• Genetics

• Taxonomy

• Histology

_______ is the father of genetics because he laid the groundwork of much f our understanding of genetics today.

• Charles Darwin

• Erasmus Darwin

• Gregor Mendel

• De Buffon

Mendel use pea plants because they _______and he could easily control how they mate.

• grow taller

• has strong roots

• requires less water

• grow quickly

When a line of plants self-pollinates for long enough, the line becomes genetically uniform or _______.

• test cross

• purebred

• segregate

• none of the option is correct

In Genetics, the mating of two organisms is called a _____.

• Cross

• traits

• purebred

• test cross