Introduction to Genetics Answers
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Anita thinks that she has heterozygous alleles for red hair. If she is correct, which of these diagrams best illustrates Anita’s alleles for red hair?
A
2 chromosomes are labeled Upper R and Upper R.
B
2 chromosomes are labeled Upper R and r.
C
One chromosome is labeled Upper R and another is unlabeled.
D
2 chromosomes are labeled r and r.
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What did Chargaff discover while studying bases in the DNA of organisms?
A
The bases in the DNA of each organism were unique.B
The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.C
The overall percentages of bases were different from one organism to the next.D
There were equal amounts of all four bases in every organism, or 25 percent of each base.23
Based on scientific research, which statement best describes mutations?
A
Mutations are rare occurrences.B
Mutations are always harmful.C
Mutations cannot be inherited.D
Mutations cannot be acquired.24
Which is one of the primary goals of the Human Genome Project?
A
to cure all diseases that affect humansB
to sequence the genome of every living individualC
to identify the 20,000 to 25,000 genes that comprise the human genomeD
to measure the length of human DNA25
Which best describes the outcome of DNA replication?
A
The new DNA molecule is identical to the original DNA.B
The new DNA molecule is synthesized from amino acids.C
The new DNA molecule has a different number of codons.D
The new DNA molecule is single-stranded.Did you find these answers helpful?
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