Briefly describe the structure of compound chromosomes, and explain how their behavior during meiosis can be used to study underdominance
What will be an ideal response?
Compound chromosomes are homologous chromosomes that have exchanged entire arms; one homolog therefore contains two copies of one arm, whereas the other homolog contains two copies of the other arm. During meiosis, four types of gametes are produced in equal numbers; gametes with both homologous chromosomes, gametes with just one member of the pair, gametes with the other member of the pair, or gametes containing no members of the homologous pair. Heterozygotes produced are therefore not viable, so the resultant populations consist of only homozygotes.
You might also like to view...
Dendrites are slender extensions of the cell body that carry information away from the cell body of the neuron.
a. true b. false
What property of phospholipids makes them suitable for the formation of the double layer found in membranes?
A. They have both a hydrophobic and a hydrophilic end. B. They are uncharged. C. They can interact with proteins. D. They serve as an attachment site for carbohydrates. E. They are composed of fatty acids.
Migration occurs when individuals move between populations. Considering a single pair of alleles, A and a, which formula is used to indicate the new frequency of A in one generation of migration?
What will be an ideal response?
The binding of arabinose to the AraC protein allows it to form a loop in the DNA upstream of the ara operon promoter.
Answer the following statement true (T) or false (F)