Mendel’s plant experiments demonstrated that
A. peas were a poor choice for understanding basic hereditary principles.
B. DNA was the molecule carrying the genetic code.
C. traits are passed on from parent to offspring as discrete units.
D. traits inherited from each parent blended together in the offspring.
C. traits are passed on from parent to offspring as discrete units.
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The enterobacteria in the order Enterobacteriales are readily distinguishable from one another by morphological criteria.
Answer the following statement true (T) or false (F)
Human and chimpanzee genomes share 96% DNA sequence identity. What most likely causes humans to be
phenotypically distinct from chimpanzees?
a. the presence of many new genes unique to humans b. a much larger human genome compared to the chimpanzee genome c. the loss of higher functioning genes in chimpanzees d. dramatic changes in chromosome structure and organization in humans e. small mutations in protein coding sequences and changes in regulatory units of human genes
A host plant race may develop ____
a. only when an organism’s genes for the host choice change b. only when an organism’s genes for mating preferences change c. only when a geographical barrier exists d. when genes for the host choice mating preferences change e. when genes for mating preferences change and geographical barriers exist
During replication, which enzyme unwinds the two strands of the DNA molecule from one another?
A. Primases B. Helicases C. Unwindases D. Ligases