Describe why allelic phase is a major obstacle in mapping human genes
What will be an ideal response?
Allelic phase is the arrangement of different alleles of linked genes on homologous parental chromosomes. Allelic phase is required for genetic linkage analysis because you need to know which alleles are unique to "parental" and "recombinant" gametes.
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In testing a hypothesis that "territorial defense in European robins is a fixed action pattern that is released by the sight of orange feathers,"
researchers found that robins defended their territory by attacking anything that was of similar size and had an orange patch. What experiment would you perform next to determine that the color initiated the defense response? A) Repeat the experiment using a blue patch instead of an orange patch. B) Repeat the experiment by removing the patch completely. C) Repeat the experiment by using a model of a robin that was twice the size of a normal robin but with a small orange patch. D) Repeat the experiment by using a model of a robin that had an orange patch that was twice the size of a normal patch.
A fabric company wants to create a new material based on cell research for the army that is able to bear high levels of tension efficiently. What cellular structure should be the target?
A. Microtubules B. Intermediate filaments C. Microfilaments D. Centrioles E. Pili
Synapsis refers to the ____
a. crossing-over between homologous chromosomes b. alignment of homologous chromosomes along the equatorial plane c. alignment of sister chromatids along the equatorial plane d. pairing of homologous chromosomes during prophase I e. pairing of sister chromatids during prophase II
Pollen is derived from mitosis and differentiation of ________
a. the endosperm mother cell b. megaspores c. the integuments d. microspores