7.1 Meiosis 2023

What percentage of chromosomes normally found in the body cells of an organism do gamete cells contain after meiosis?

• 25%

• 50%

• 60%

• 100%

What process shown to the right increases the variations of chromosomes?

• cellular respiration

• gene splicing

• cytokinesis

• crossing over

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Which of these is a primary benefit of meiosis and sexual reproduction to a population?

• an increase in the chromosome number

• new forms of proteins

• new combinations of genes

• new alleles in the population

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Meiosis is significant within a population because it increases the –

• number of mature males

• genetic variations in the population

• amount of genetically modified organisms

• number of new alleles available

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Offspring that are the result of sexual reproduction are best described by which of the following?

• The offspring are genetically identical to the biological mother and father

• The offspring are genetically unique and contain a new combination of genes

• The offspring contain fewer chromosomes than either parent because of meiosis

• The offspring contain all of the dominant genes found in the grandparents

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The number of chromosomes found within the cells of any given species is a constant number maintained through multiple generations. The accumulation of chromosomes is prevented because the process of meiosis creates –

• haploid gamete cells

• mutations that destroy extra DNA

• genetically identical daughter cells

• offspring through asexual reproduction

When fertilization occurs, the resulting zygote is a diploid cell containing two of every type of chromosome. This is because one of each type of chromosome is –

• mutated by ultraviolet radiation

• deleted during the fertilization process

• contributed by both parents

• duplicated within sperm cells

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Asexual reproduction and mitosis occur in...

• Body Cells
• Sex Cells or Gametes

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The purpose of sexual reproduction and meiosis is to form ________ cells.

• body
• sex
• somatic
• brain

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What is one of the advantages, of reproducing sexually versus asexually?

• survival of the fittest
• overproduction
• genetic variation
• cloning

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