Mendelian Genetics

What did Gregor Mendel use to discover the principles that rule heredity?

• Pea Plant
• Pigeons
• Pear trees
• Photosynthesis

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Gregor Mendel is known as the father of _________

• Modern Medicine
• Father of the Green Revolution
• Father of Genetics
• The Pea Plant Man

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Mendel proposed that traits observed in pea plants resulted from a combination of "factors" inherited from each parent. His description of these "factors" can be considered the first scientific definition of the role of —

• ribosomes

• meiosis

• genes

• cell nuclei

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Which of the following traits of a dog is inherited from its parents?

• the presence of fleas in its fur

• the color of its fur

• the ability to sit up and beg

• the habit of barking to go outside

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Start with the P generation with the following genotypes (AA x aa). Based on classical Mendelian inheritance, how will a cross between two homozygous parents, one dominant, one recessive, influence future generations?

• The F1 generation will show an even split between the dominant phenotypes and the recessive genotype.

• The F1 generation will show the dominant trait and future crosses will continue to produce genotypes expressing the dominant trait.

• Although the F1 generation will all show the dominant trait, the offspring will all be heterozygous and increase the chances of future variation.

• The F1 generation will show a mix of the dominant phenotype and recessive phenotype and over generations, the recessive trait will increase in number.

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A couple has three brown-eyed children. The parents are brown-eyed (Bb). The allele for brown eyes is dominant over the allele for blue eyes. They believe the fourth child they have will be blue-eyed. Which statement below explains what actually will happen?

• The couple will have a blue-eyed fourth child.

• The couple will have a brown-eyed fourth child.

• They have a 75% chance of having a blue-eyed child.

• They have a 25% chance of having a blue-eyed child.

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Chickens can have different types of feathers. Frizzled feathers curl toward a chicken’s head. Assume that feather type is determined by a single gene and that the allele for frizzled feathers is dominant over the allele for straight feathers. In a cross between two chickens with straight feathers, what percentage of the offspring can be expected to have frizzled feathers?

• 0%

• 25%

• 50%

• 100%

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NGSS.HS-LS3-3

In guinea pigs Black fur (B) is dominant to white(b), cross Bb x bb and determine genotypic ratio for offspring

• 2:2

• 0:2:2

• 1:2:1

• 2:2:0

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T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

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Objective #5

(B-brown eyes & b-blue eyes)

Cross (Dad)Bb X (Mom)BB.

List the possible genotypes from this cross.

• BB, Bb, bb

• BB

• BB, Bb

• bb,Bb

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