AP BIOLOGY

Previous
Next

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Polyploidy occurs quite often in plants where the chromosomes duplicate causing a plant to have diploid gametes instead of haploid. When a tetraploid and diploid plants of the same species produce offspring, the result is a sterile triploid plant. The tetraploid plant can however mate with another tetraploid plant and produce fertile offspring. Which of the following is used to describe this type of speciation?
A
Sympatric
B
Allopatric
C
nonsympatric
D
post zygotic
Explanation: 

Detailed explanation-1: -The fusion of two or more genomes within one nucleus results in polyploidy, resulting in each cell containing more than two pairs of homologous chromosomes. Polyploidy occurs in the majority of angiosperms and is important in agricultural crops that humans depend on for survival.

Detailed explanation-2: -Polyploidy is the heritable condition of possessing more than two complete sets of chromosomes. Polyploids are common among plants, as well as among certain groups of fish and amphibians.

Detailed explanation-3: -polyploidy, the condition in which a normally diploid cell or organism acquires one or more additional sets of chromosomes. In other words, the polyploid cell or organism has three or more times the haploid chromosome number.

Detailed explanation-4: -Polyploidy occurs in highly differentiated human tissues in the liver, heart muscle, bone marrow and the placenta.

There is 1 question to complete.
Previous
Next