At what light intensity (approximately) do sun and shade plants have similar rates of photosynthesis? (SC.912.N.1.1)
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1 point
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380 umol photons/m2/s
450 umol photons/m2/s
800 umol photons/m2/s
1000 umol photons/m2/s
3. Alleles for the A and B blood cell antigens are codominant. The condition where no antigens are present on the blood cells (type O blood) is a recessive trait. Which set of parents can most likely produce a child with type O blood? (SC.912.L.16.1)
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1 point
one parent with type AB blood, and the other parent with type A blood
one parent with type AB blood and the other parent with type O blood
one parent with heterozygous type A blood, and the other parent with type O blood
one parent with homozygous type A blood, and the other parent with homozygous type B blood
4. Hitchhiker's thumb (H) is dominant to no hitchhiker's thumb (h). A woman who does not have hitchhiker's thumb marries a man who is heterozygous for hitchhiker's thumb. What is the probable genotypic ratio of their children? (SC.912.L.16.1)
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1 point
0% Hh: 100% hh
50% Hh: 50% hh
75% Hh: 25% hh
100% Hh: 0% hh
5. This diagram shows a pedigree for a recessive genetic disorder. What is the genotype of individual 6? (SC.912.L.16.1)
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1 point
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A.
B.
C.
D.
6. This diagram shows a diploid cell with two pairs of homologous chromosomes. Due to independent assortment, what is the possible genetic make-up of gametes produced by this organism? (SC.912.L.16.1)
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1 point
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SsTt
Ss, Tt
S, s, T, t
ST, St, sT, st
7. Which choice describes DNA after replication has taken place? (SC.912.L.16.3)
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1 point
one molecule with two original strands and one molecule with two new strands
two molecules, each with one original and one new strand
two molecules, each with two new strands
two molecules, each with two old strands
8. Four different segments of a DNA molecule are represented below.
Which DNA Segment contains an error? (SC.912.L.16.3)
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1 point
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Segment 1 only
Segment 3 only
Segments 2 and 3
Segments 2 and 4
9. During transcription the DNA base sequence is transcribed into a complimentary mRNA sequence. A codon table like the one shown below lists the amino acids coded for by particular triads of mRNA bases. A segment of DNA has undergone a mutation in which one nucleotide has been changed. The original sequence was ACG and the new sequence is ACA. Use the codon table to determine whether or not this mutation will cause a change in the phenotype of the organism.
(SC.912.L.16.3)
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1 point
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Yes, the phenotype of the organism would change because a new amino acid will be coded for.
Yes, the phenotype of the organism would change because any change in the DNA sequence will cause a change in phenotype.
Even though the DNA sequence changed, the sequence still codes for the same amino acid, so no change in phenotype will occur.
It is impossible to determine if a change in phenotype will occur using only the DNA sequence.
10. A diagram of a cellular process is shown below. Which of the following identifies the process shown at point Z? (SC.912.L.16.3)
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1 point
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Translation
Translocation
Replication
Transcription
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