During prophase I of meiosis, homologous chromosomes lie side by side. This phenomenon is known as:
a. chromatid pairing.
b. DNA replication.
c. tetrad formation.
d. paternal pairing.
e. parental pairing.
c
You might also like to view...
Many amphibian populations have been decimated by a parasitic fungus classified as a member of the _____
A) Chytridiomycota B) Ascomycota C) Basidiomycota D) Zygomycota E) Glomeromycota
While in South America, you come across what you think are two groups of birds in the same location. They are nearly identical aside from their color
After years of observation, you conclude that the birds eat similar diets and share similar behaviors but do not reproduce with each other. These groups of birds appear to be an example of A. a single biological species. B. a single ecological species. C. a ring species. D. two different species on the basis of the ecological niche occupied. E. two different species on the basis of reproductive behavior.
Darnell and Tinaka are each carriers of an autosomal recessive disorder that is lethal in early childhood. They want to have a child who is free of the disease, so they have preimplantation genetic diagnosis. Unfortunately, their child has the disease. A scientific explanation is that
A) the blastomere that was tested had undergone a somatic mutation, making it not representative of the rest of the embryo. B) Darnell was not really the father. C) the 7 cells of the remaining embryo each underwent a mutation, so the sampled cell was not representative. D) Darnell or Tinaka is really homozygous recessive, and not heterozygous.
You want to study an aspect of the mosaic theory of coevolution and you are looking for a suitable study sys-tem. Which of the following is the most important condition that your study system needs to fulfill?
a. It needs to involve an insect plant interaction. b. It needs to be a case of coevolution. c. The system must be organized as a true metapopulation. d. Coevolution is largely independent in different subpopulations.