Genetic Variation and Alleles
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Questions and Answers

What is an allele?

  • A type of chromosome
  • A genetic mutation
  • A gene that codes for flower color
  • Any of the alternative forms of a gene that may occur at a specific locus (correct)

How many alleles do your cells have for each gene?

  • Two (correct)
  • Four
  • Three
  • One

What does homozygous mean?

  • Having only one chromosome
  • Having two different alleles at a specific locus
  • The process of cell division
  • Describing two of the same alleles at a specific locus (correct)

In genetics, what does heterozygous refer to?

<p>Having different alleles at a specific locus (A)</p> Signup and view all the answers

How many alleles are there in a homozygous individual for a specific gene?

<p>Two (A)</p> Signup and view all the answers

What term describes the allele that is only expressed when two copies are present?

<p>Recessive (A)</p> Signup and view all the answers

Why is an allele considered dominant in a heterozygote?

<p>It is expressed while the recessive allele is not (C)</p> Signup and view all the answers

How are alleles typically represented on paper?

<p>With individual letters (C)</p> Signup and view all the answers

In Mendel's experiments, what type of flowers were observed in the F1 plants?

<p>Purple flowers (D)</p> Signup and view all the answers

How is the genotype for a trait typically represented using letters?

<p>Uppercase letters for both alleles (C)</p> Signup and view all the answers

What is the main focus of the Human Genome Project?

<p>Analyzing the genetic material of organisms (B)</p> Signup and view all the answers

What term is used to describe all of an organism’s genetic material?

<p>Genome (D)</p> Signup and view all the answers

Which term typically refers to the genetic makeup of a specific set of genes?

<p>Genotype (A)</p> Signup and view all the answers

What is expressed when an organism is heterozygous for a trait?

<p>Dominant allele (B)</p> Signup and view all the answers

What do we call the physical characteristics of an individual organism?

<p>Phenotype (D)</p> Signup and view all the answers

If a pea plant has one allele for purple flowers and one for white flowers, what color will the flowers most likely be?

<p>Purple (D)</p> Signup and view all the answers

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