grade 9 unit 3 revision

GR: Learn to walk in children is not considered a genetic trait

• Because it's acquired trait that can be transmitted from a generation to

• Because it's acquired trait that can't be transmitted from a generation to

• Because it's hereditary trait that can't be transmitted from a generation to

GR: Mendel is considered as the founder of heredity.

• according to the results reached by Mendel, heredity scientists have gathered a lot of information about how the hereditary traits are transmitted from one generation to another

• according to the results reached by Mendel, heredity scientists have gathered a few of information about how the hereditary traits are transmitted from one generation to another

• according to the results reached by Mendel, heredity scientists have gathered a lot of information about how the acquired traits are transmitted from one generation to another

GR: Mendel removed the stamens of pea plant flowers before the anther becomes mature.

• To insure that the plant doesn't be pollinated.

• To insure that the plant self-pollinated.

• To insure that the plant doesn't be self-pollinated.

GR: Mendel let the pea plants self-pollinate for several generations.

• To be sure of the purity of the trait.

• To be sure of the trait is hyperiid

• none

GR: When a pure yellow pod pea plant is pollinated with a pure green pod pea plant, they produce plants all are green pods

• Because the yellow pod trait dominates over the green pod trait in the pea plant

• Because the green pod trait dominates over the yellow pod trait in the pea plant

• Because the green pod trait is recessive

GR: The recessive trait is always pure.

• Because it doesn't appear unless the two genes of recessive trait aggregate.

• Because it doesn't appear unless the two genes of dominates trait aggregate.

• none

GR: The curly hair trait dominates over the smooth hair trait

• Because the gene of smooth hair dominates over the gene of curly hair when they aggregate together.

• Because the gene of curly hair is recessive

• Because the gene of curly hair dominates over the gene of smooth hair when they aggregate together.

GR: the enzymes play an important role in the appearance of the hereditary traits.

• Because every gene gives a special enzyme which is responsible for the occurrence of a chemical reaction resulting in a protein shows a specific hereditary trait.

• Because every gene gives a several enzyme which is responsible for the occurrence of a chemical reaction resulting in a protein shows a specific hereditary trait.

• Because every gene gives a special enzyme which is responsible for the occurrence of a chemical reaction resulting in a lipid shows a specific hereditary trait.

GR: About 500.000 people every year are affected by losing their sight in developing countries

• As a result of malnutrition which is produced from deficiency in vitamin (C)

• As a result of malnutrition which is produced from deficiency in vitamin (A)

• As a result of malnutrition which is produced from deficiency in vitamin (E)

GR: Scientists are interested in creating genetically modified rice.

• Because the normal rice doesn't contain glucosamine substance which changes inside the body into vitamin (A), which its deficiency in the body leads to losing the sight

• Because the normal rice doesn't contain carotene substance which changes inside the body into vitamin (C), which its deficiency in the body leads to losing the sight

• Because the normal rice doesn't contain carotene substance which changes inside the body into vitamin (A), which its deficiency in the body leads to losing the sight