Dominant alleles are represented by

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1 point
upper case letters
lower case letters
numbers
none of the above

9 answers

upper case letters

Which combination of alleles below represents a recessive trait?
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1 point
RR
Rr
rR
rr

rr

The study of genes, gene variation and heredity is called
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1 point
Chemistry
Engineering
Genetics
Forensics

Genetics

The physical appearance of an organism is represented by the _______.
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1 point
genotype
phenotype
Z-type
None of the above

phenotype

True or False:
Genes carry instructions that determine a person's traits. These instructions are found on alleles.
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1 point
True
False

True

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