Question

22.
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A distinguishing characteristic or quality is called a(n) .

allele

genotype

trait

gene
23.
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A gene is ______ if the alleles for a trait are the same (MM or mm).

monohybrid

phenotype

homozygous

heterozygous
24.
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A ___ or change in a gene causes the disease hemophilia in of cases of the disease.

mutation

replication

duplication

vector
25.
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The building blocks of proteins are called ___.

amino acids

nucleic acids

nucleotides

codons
26.
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Offspring receive different allele pairs independently of each other because of the _______________.

principle of segregation

principle of genetics

principle of independent assortment

principle of the next generation
27.
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Several alleles that are part of a __________ control the expression of one trait.

dihybrid

multiple-allele series

triploidy

double helix
28.
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Gene U controls the expression of other genes; therefore, Gene U is a ________ gene.

modifying

dominant

recessive

regulating
29.
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Trait A is expressed because of Genes X, Y, and Z. Trait A is a(n) __________.

inherited trait

polygenic trait

physical trait

pleiotropy
30.
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During a genetic counseling session, you are told that the _________ of having brown-eyed child is .

genetic engineering

transcription

probability

mutation
31.
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For the trait of hair color, only one of the alleles from each parent gets passed down to the offspring because of the ______.

principle of independent assortment

principle of the next generation

principle of segregation

principle of genetics

Answer 1

22. trait
23. homozygous
24. mutation
25. amino acids
26. principle of independent assortment
27. multiple-allele series
28. regulating
29. polygenic trait
30. probability
31. principle of segregation