Imagine in lemmings, that gray fur color (G) is dominant over white (g). There is another gene, called color, and individuals must have at least one color (C) allele for gray color to be expressed. A lemming that is heterozygous at both loci is crossed with a white lemming that is heterozygous for gray fur color. Which of the following is correct regarding their offspring?
A. All will be gray
B. All will be white
C. 3/8 will be gray, 5/8 will be white
D. 1/4 will be gray, 3/4 will be white
E. They will have a ratio of 9 gray:7 white
C. 3/8 will be gray, 5/8 will be white
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Which of the following contain enzymes, are the
main organelles of intracellular digestion, and can digest whole cells? a. Golgi bodies b. vesicles c. peroxisomes d. lysosomes e. endoplasmic reticula
A CBC, differential, and flow cytometry were performed on a patient with the following results (normal values): WBC = 8.0 th/uL (5.0-10.0 th/uL), diff = 90% lymphs (20-40%), CD3 = 5% (60-80%), CD5 = 95% (60-80%), CD19 = 95% (5-20%), CD10 = 0% (0%), surface Ig = pos (positive), and cytoplasmic Ig = neg (negative). What disease does this patient have?
A) B-cell acute lymphocytic leukemia B) B-cell chronic leukemia C) T-cell acute lymphocytic leukemia D) T-cell chronic leukemia E) AIDS
Crossing over refers to the exchange of genetic material between two homologous chromosomes. Which of the following statements about this event is correct?
a) Crossing over is more likely to occur between two genes that are widely separated on the chromosomes. b) Crossing over is more likely to occur between two genes that occur next to each other on a chromosome. c) Crossing over is more likely to occur with recessive alleles than with dominant ones. d) Both a) and c) are correct. e) Both b) and c) are correct.
The events of ________ are initiated at sequences called origins
A) DNA replication B) translation C) splicing D) transcription E) transposition