AP Biology Genetics WarmUp

One of the main reasons genes assort independent of one another  is that 

• they produce unrelated traits
• they produce related traits
• they are on the same chromosome
• they are on different chromosomes.

If 2n = 48 for a particular cell, then the chromosome number in each cell after meiosis would be

• 96

• 48

• 24

• 12

The process depicted in the image above is best summarized by which of the following descriptions?

• During the synthesis phase of the cell cycle, DNA molecules replicate to generate identical daughter cells

• Centromeres align specific gene sequences of homologous chromosomes during mitotic divisions.

• The spindle apparatus attaches at chiasma during metaphase of mitosis.

• During meiosis, crossing over leads to recombination of alleles between homologous chromosomes

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DNA is replicated during ______ of the cell cycle.

• G1
• S
• G2
• G0

If black and white true-breeding mice are mated and the result is all gray offspring, what inheritance pattern would this be indicative of?

• dominance
• codominance
• multiple alleles
• incomplete dominance

The range of human skin colors is caused by a variety of genes, each of which has at least 2 alleles.  This is an example of:

• incomplete dominance
• codominance
• multiple alleles
• polygenic inheritance

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An alternate form of a gene for a specific trait or gene product

• genotype

• allele

• gene

• phenotype

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The observable characteristics or traits of an organism

• genotype

• phenotype

• dominant

• homozygous

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The basic unit of heredity that consists of a segment of DNA on a chromosome

• chromosome

• double helix

• homozygous

• gene

An organism that inherits two of the same alleles from its parents

• dominant

• phenotype

• heterozygous

• homozygous

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