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Genetics

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
show Differences in an organism’s characteristics. Ex: Eye color such as blue or brown  
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What plant did Gregor Mendel use to investigate how organisms inherit traits from their parents?   show
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show Parent plants that, after many generations of self-pollination, a colored flower plant produces only that color.  
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show He crossed two contrasting, true breeding plants for two different traits for a particular characteristic.  
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What is an F1 generation?   show
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show Mendel concluded that differences in inherited traits result from alternative versions of genes (which Mendel called “factors”). These are referred to as alleles. Each organism receives 2 copies.  
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show The dominant allele would be expressed while the recessive allele would lie dormant.  
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Where can recessive alleles be seen?   show
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How are alleles represented?   show
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How many alleles do organisms inherit for each character?   show
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show An organism that contains two different alleles for a given character.  
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show When an organism contains two identical alleles. An organism can be homozygous recessive (if both alleles are recessive) or homozygous dominant (if both alleles are dominant).  
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show An observable trait.  
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What is a genotype?   show
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Explain the law of segregation.   show
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When does the law of segregation apply?   show
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show States each pair of alleles segregates independently of one another during the formation of gametes  
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show When the alleles for 2 different characters are located on the same chromosome.  
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show The genotype for a given trait for two breeding individuals. This is a prediction for the offspring.  
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show 25% chance.  
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Explain co-dominant alleles.   show
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show Two alleles for a given character are only somewhat, or partially, expressed. Neither allele is dominant over the other, and so a blend of the two results.  
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show The 23rd pair of chromosomes that comes from males.  
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show When Mendel selected traits to study in his pea plants, he chose ones that were controlled by single genes. It doesn't give a complete picture as to how most phenotypes are determined.  
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True or False: Most phenotypes are controlled by more than one gene.   show
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By observing more than one type of trait simultaneously over multiple generations, which law did Mendel discover?   show
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show Trait  
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Joseph expresses a recessive phenotype for red hair. What is the best prediction regarding his genotype?   show
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show False.  
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show 75%  
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A newborn puppy has 2 alleles for floppy ears. During which part of the reproductive process did the alleles separate as the puppy was developing?   show
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show Patches of white and patches of red.  
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True or False: If the attached-earlobe allele is recessive to the free-earlobe allele, a person with one of these alleles will have free earlobes.   show
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If a person has a dominant allele for brown eyes and a recessive allele for blue eyes, what is their eye color?   show
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True or False: If a "widow's peak" of hair is a dominant trait, someone with a widow's peak may not be heterozygous for the trait.   show
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show Homozygous.  
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Under normal circumstances, an organism receives _________ chromosomes.   show
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Two parents have webbed toes and are homozygous for the trait. What can be concluded based ONLY on this information?   show
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