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Types of Variations – Somatogenic and Blastogenic Variation • Changes in somatic parts of the body are somatic variations e.g. wrestler’s muscle, circumcised penis of muslims, etc., not inheritable, hence have no role in evolution. • Blastogenic variations are the changes at germinal cell level or in the genotype or […]

Students in a high school Marine Science class are learning about the scientific process. Four students were asked to write a testable prediction about cold weather and oceans. Their responses are shown in the chart. Student Response Olivia Cold weather causes areas of the oceans to freeze. Daniel Commercial fishing is bad […]

Flower position, stem length, and seed shape were three charactersthat Mendel chose to study. Each is controlled by an independently assorting gene andhas dominant and recessive expressions as follows:Trait Dominant RecessiveFlower position Axial (A) Terminal (a)Stem length Tall (L) Dwarf (l)Seed shape Round (R) Wrinkled (r)If a plant that is […]

Lab mice are immunized with a measles vaccine. When the mice are challenged with the measles virus to test the strength of their immunity, the memory cells do not completely prevent replication of the measles virus. The virus undergoes a few rounds of replication before the immune response is observed. […]