Genetics- S7L3

What is a probable reason that a trait skips a generation?

• The trait is recessive.

• The trait is dominant.

• The trait has been amplified.

• The trait is extinct.

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NGSS.HS-LS3-1

Which question does the process of selective breeding help to resolve?

• How can the most desired traits in offspring be achieved?

• How can mutations that are passed onto offspring be avoided?

• How can two organisms be prevented from producing offspring?

• How can breeding be sped up to increase the number of offspring?

In squirrels, the gene for gray fur (G) is dominant over the gene for black fur (g). If 50% of a large litter of squirrels are gray, what was the most likely parental cross?

• GO × GO

• Gg × gg

• gg × gg

• GG × Gg

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Each species has a specific identifying number of chromosomes. For example, a cat, Felis catus, has 38 chromosomes, while corn, Zea mays, has 20 chromosomes. Each chromosome carries

• the same genes as all of the other chromosomes in the set.

• specific genes that are unique to that chromosome.

• an enzyme helicase that binds the chromosome when it breaks.

• identical DNA and RNA that was received from the parents.

Tags

NGSS.HS-LS3-1

A human male will normally transmit the genes on his X chromosome to

• all of his sons and daughters.

• only his daughters.

• some of his sons and daughters.

• only his sons.

Tags

NGSS.HS-LS3-1

Which of the following best describes genes?

• polymers of peptides used to make proteins

• nucleotide sequences in DNA that code for traits

• pieces of RNA that produce carbohydrates

• collections of nucleic acids that generate energy

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two sisters are born from a father who has blue eyes and a mother who has brown eyes. One sister has blue eyes, and the other has brown eyes. Which of the following explains this difference in eye color?

• Each sister inherited a different combination of alleles from their parents that determined their eye color

• One of the sisters inherited all of her alleles from the mother, and the other sister inherited only from the father.

• The environment caused the alleles to be expressed in different ways, making the sisters' eye colors different.

• The sister with the blue eyes had only one allele for determining eye color, and the sister with brown eyes had two.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Where is DNA mostly found within a cell?

• in the ribosomes within the nucleus

• in the cytoplasm within the cell wall

• in the chromosomes within the nucleus

• in the mitochondria within the cell wall

Tags

NGSS.MS-LS1-2

Which statement best describes the relationship between inherited traits and genes?

• An individual's inherited traits are determined by genes, which are located inside a person's chromosomes.

• An individual's inherited traits are based on a person's environment, and the traits change over time

• Inherited traits are determined by a person's health and nutrition.

• Inherited traits are determined only by a person's maternal parent.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The process of choosing a specific organism to breed based on producing desired traits is called

• selective breeding.

• natural selection.

• natural breeding.

• selective evolution