The Level of Recombination Between Species Is Estimated to Be

question 35

Multiple Choice

The level of recombination between species is estimated to be about how many times greater than the mutation rate?

• A) 10
• B) 20
• C) 50
• D) 100
• E) 1,000

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Definitions:

Holoblastic Cleavage

A cleavage pattern in which the entire embryo cleaves; characteristic of eggs with little or moderate yolk (isolecithal or moderately telolecithal) (e.g., the eggs of echinoderms, amphioxus, and mammals). Compare with meroblastic cleavage.

Meroblastic Cleavage

Cleavage pattern observed in the telolecithal eggs of reptiles and birds, in which cleavage is restricted to a small disc of cytoplasm at the animal pole. Compare with holoblastic cleavage.

Cleavage Pattern

The division of cells in the early embryo, determining the spatial arrangement of cells in the resulting organism.

Isolecithal Eggs

Eggs with a small amount of evenly distributed yolk, typically found in mammals including humans.