Variation Biology F5 KSSM Chapter 12

These moths are all the same species. The differences between their wings is an example of ............

Variation refers to the differences in characteristics found within the same population or species.

The characteristics in the above statement refers to...

Biston betularia (moth) with wings similar to the color of tree bark are better able to camouflage themselves than moths of a different color. As a result, the tree-colored moths are more likely to survive from predator, reproduce, and pass on their genes.

The above statement is can be describe as....

• A variation in which the differences in the characteristic is not distinct.

• Individuals show gradual differences in characteristic from one extreme to the other extreme.

The above statement describes....

• Distinct differences in characteristic.
• The characteristic is not influenced by environmental factors.

Which type of variation is represented by the graph? 

Choose the correct genetic factors which causes discontinuous variation.

.................... is a permanent change which occurs spontaneously on genes or chromosomes.

Acidic soil, with a pH lower than 6.0, yields blue or lavender-blue hydrangea blooms. Alkaline soil, with a pH above 7.0, promotes pinks and reds. With a pH between 6 and 7, the blooms turn purple or bluish-pink.

The above statement is an example of......

Choose the dominant traits in humans.

........... is a spontaneous and random change of genetic material, namely DNA of the cell in an organism.

A substance which causes mutation or increases the mutation rate to a dangerous level is called a .......................

The types of gene mutations are...

When there is a portion of nucleotide is removed from the sequence, it is a _________ mutation

DNA molecule segment is : TTACGCAAG The mutated DNA segment is TTCCGCAAG. This is an example of ___ mutation.

DNA molecule segment is : TTCAAG The mutated DNA segment is TTCCGCAAG. This is an example of ___ mutation.

Choose the example disease caused by gene mutation.

Chromosomal mutation involves changes to chromosomal structure or changes to the chromosomal number.

Changes in chromosomal structure involve changes

to the gene sequence in a chromosome. The structural

change causes abnormality to the chromosome, which is

known as chromosomal .......

What situation causes a deletion?

What situation causes a duplication?

What situation causes a translocation?

What situation causes an inversion ?

Non disjunction of chromosomes occurs during?

Examples of nondisjunction occur at sex chromosomes during oogenesis or spermatogenesis.

The structure of chromosome changes due to a partial deletion on the short arm of chromosome number 5.

Mutation in somatic cells will cause the variation cannot be inherited by the next generation whereas mutation in gametes can be inherited by the next generation.