Fertile Tetraploids Seem to Have Arisen by Chromosome Duplication in a Hybrid

question 51

Multiple Choice

Fertile tetraploids seem to have arisen by chromosome duplication in a hybrid that was produced by a cross of:

• A) Two different, but related, diploid species
• B) Two identical diploid species
• C) Four different bur related haploid species
• D) Four identical diploid species
• E) Four identical haploid species

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Definitions:

Birthrate

The ratio of total live births to the population in a specified area or period, usually calculated per thousand inhabitants per year.

Demographic Transition

A theory describing the transition from high birth and death rates to lower birth and death rates as a country develops from a pre-industrial to an industrialized economic system.

Demographic Transition

A model describing the transformation of birth and death rates from high to low levels in a society over time, typically associated with economic development.

Resource Demand

The requirement for raw materials, labor, and other inputs needed by businesses to produce goods and services.