Mendel determined that tall pea plants were dominant to short pea plants. Cross a homozygous short pea plant with a heterozygous tall pea plant. Which of the following is the phenotypic ratio of the offspring?
a. 1:0
b. 1:1
c. 1:2:1
d. 3:1
e. 4:1Text section: LO2Key Concept: autosomal dominant/recessive inheritance
Level: Application of concepts
B; tt x Tt will give a 1:1 ratio of heterozygous and homozygous recessive.
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Select all of the following that are true about the chondrichthyans.
_____ They have internal fertilization. _____ They were the first fish to develop teeth. _____ Their buoyance is maintained by oil. _____ They are known for acute color vision. _____ Their teeth are composed of dentin and enamel.
What will occur most immediately after the process shown in the diagram?
a. Phosphofructokinase reactions will be inhibited.
b. Glucose-6-phosphate levels will decrease.
c. Glucose-6-phosphate levels will increase.
d. Phosphofructokinase reactions will increase.
Transformation of cells using the technique of heat shock requires which of the following?
A) the use of zinc ions B) brief electric shock C) the use of calcium ions D) brief exposure to elevated temperature E) the use of calcium and brief exposure to elevated temperature
Modern eukaryotic cells appeared ____ billion years ago
a. 0.5
b. 1 c. 1.5 d. 2 e. 3.7