8th Grade Science Final Exam Review

Which of these is NOT a characteristic of asexual reproduction?

• Individuals have the same genetic makeup across many generations.

• The daughter cells have half the chromosomes of the parent cell.

• Harmful traits are kept out of the general population of the species.

• The main source of variation stems from random mutations.

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NGSS.MS-LS3-2

What is the advantage to Chlamydomas in changing from asexual reproduction to sexual reproduction?

• The offspring production by asexual reproduction are too diverse to adapt to the new environment.

• Sexual reproduction would produce a new strain of algae that are all the same and would be stronger than the old strain.

• Some of the offspring produced by sexual reproduction might have traits that would help them survive in the new environment.

• Sexual reproduction would limit the introduction of new, harmful traits in the offspring.

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NGSS.MS-LS3-2

NGSS.MS-LS4-4

What is a disadvantage of sexual reproduction?

• Organisms that reproduce sexually are usually crowded out by organisms that reproduce asexually.

• Sexual reproduction takes place too slowly to allow time for a species to adapt to changed conditions.

• The offspring produced by sexual reproduction are so diverse that they cannot live together.

• There is a greater risk of new harmful traits (mutations) spreading through the population.

Tags

NGSS.MS-LS3-2

Sarah and Jim are siblings, and they both have brown eyes. Their mom, dad, grandparents, uncles, aunts and cousins have brown eyes, as well. This example provides evidence that human traits can be

• inherited

• learned

• influenced by the environment

• influenced by one's lifestyle

Mammals reproduce through a process called sexual reproduction. During this process, which involves two parents,

• a female egg cell and a male sperm cell each develop separately into an offspring that is identical to its parent.

• a female egg cell and a male sperm cell each develop separately into an offspring that is different from both parents.

• a female egg cell combines with a male sperm cell to make an offspring that is identical to one of the parents.

• a female egg cell combines with a male sperm cell to make an offspring that is different from both parents.

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NGSS.MS-LS3-2

NGSS.MS-LS4-4

Asexual reproduction requires cells to undergo

• Mitosis

• Fertilization

• Fertilization and Evolution

• Meiosis

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NGSS.MS-LS3-2

Examine the pedigree. If curly hair (C) is a dominant trait, what are the phenotypes of the parents in the pedigree?

• Both parents have curly hair.

• Both parents have non-curly hair.

• One parent has curly hair and the other has non-curly hair.

• Both parents have the dominant trait cc.

Organisms typically have more than one form of each gene. If one form CAN mask the appearance of another form, that form is considered _____________ the other form.

• Recessive

• Dominant Over

• Better Than

• Worse Than

Genes code for specific traits in living organism. Alleles are different versions of a particular gene, and they are responsible for

• changes in weather and climate.

• variations in inherited characteristics.

• acquired characteristics, such as scars.

• environmentally induced mutations.

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NGSS.MS-LS4-4

A rabbit is carrying a dominant allele for brown hair (B) and a recessive allele for white hair (b). What is the rabbit's genotype?

• Brown Hair

• BB

• Bb

• White

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NGSS.HS-LS3-1