AP BIOLOGY

EVOLUTION

PATTERNS OF EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
T9. Which process is a cause of variation in a species?
A
metamorphosis
B
cellular respiration
C
sexual reproduction
D
regulation
Explanation: 

Detailed explanation-1: -Sexual reproduction has the potential to produce tremendous genetic variation in offspring. This variation is due to independent assortment and crossing-over during meiosis, and random union of gametes during fertilization.

Detailed explanation-2: -Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). Genetic variations that alter gene activity or protein function can introduce different traits in an organism.

Detailed explanation-3: -Sexual reproduction: Meiosis produces gametes in sexual reproduction. During meiosis, the reshuffling of genes occurs and brings variations. These variations are passed from parents to the offspring and are thus heritable.

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