An illustration constructed by a biologist to represent the evolutionary relationships between species and shared ancestors is called a(n)
A. systematic tree.
B. ancestral tree.
C. phylogenetic tree.
D. taxonomic tree.
E. tree of life.
C. phylogenetic tree.
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In bacterial cells, a cell that had the F plasmid integrated into the chromosome is known as
A) F-. B) F+. C) F'. D) Hfr. E) none of the above
Hans Spemann and Hilde Mangold conducted pioneering experiments in which they transplanted the dorsal lip of the blastopore in an early gastrula newt to the ventral side of another early gastrula newt. What was the outcome of this experiment?
A. Discovery of Spemann's organizer. B. The development of dorsal structures (neural tube, notochord) on both the dorsal and ventral parts of the gastrula that received the transplant. C. Identification of a morphogenic field in the dorsal lip of the blastopore of an early gastrula. D. Discovery of a group of embryonic cells in the dorsal lip that ultimately produce specific body structures. E. All of the choices are correct.
In horses, there are four alleles at the A locus
Arranged in dominance sequence they are:A (wild), ab (bay), ac (brown), ad (black) If you bred several bay mares whose sires were brown to a brown stallion whose sire was black, what are the genotypes of the parents; what type of offspring would be produced, and in what proportion? What will be an ideal response?
A gene’s location on a chromosome is its ____
a. genotype b. phenotype c. diploid number d. haploid number e. locus