Meiosis Review

What biological concept was Mendel studying when he crossed pea plants many times over many generations?

• Imbalance in the ecosystem

• Male and Female genetic differences.

• Dominant and Recessive traits. 

• Predator-prey relationship

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 Brown hair and brown eyes are dominant traits in humans. If both parents have brown hair and brown eyes, how is it possible that their children can have blonde hair and blue eyes?

• Both parents are homozygous for brown eyes

• The children inherited one dominant gene from each parent.

• The children inherited one recessive gene from each parent.

• Both parents are homozygous for blond hair.

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Allele A is dominant in mice and allele a is recessive. Two mice with the gene combination Aa breed and produce four offspring.

Which offspring has the recessive phenotype?

• 1

• 2

• 3

• 4

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What is the correct phenotype ratio, dominant to recessive?

• 3:1

• 1:2:1

• 2:2

• 1:3

In human beings, which factor determines the sex of an individual?

• Genes within the chromosomes

• Presence of the Y chromosome

• Pairing with the X chromosome from the mother either with an X or Y. 

• The number of chromosomes

The muscle cells of an elephant contain 62 chromosomes. How many chromosomes are in an elephant egg cell?

• 31

• 62

• 124

• 244

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 The biological selection of a particular allele from a trait to be passed to offspring has nothing to do with the selection of the allele for another trait. Which of the following supports this statement?

• Law of Recessiveness.

• Law of Segregation

• Law of Dominance

• Law of Independent Assortment

 Which biology process determines the probability that a particular allele will be found in any given gamete?

• Mutation

• Meiosis

• Mitosis

• Protein Synthesis

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Meiosis is necessary for which reproductive event to occur?

• Binary Fission

• Fertilization

• Cloning

• Vegetative Budding

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 What is the end result of crossing over in meiosis?

• Genes are mixed separately with each parent’s traits being passed down together.

• Crossing over doesn’t occur in meiosis

• Crossing over keeps the traits together.

• Genes are mixed separately giving traits from both parents to the offspring independently.

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