Variation Biology F5 KSSM Chapter 12

Variation

by ROSLINDA Moe

Multiple Choice

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

• Natural Selection
• Variation
• Evolution

Multiple Choice

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

The characteristics in the above statement refers to...

• genotype

• phenotype

Multiple Choice

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....

• Mutation

• Discontinuous variation

• Natural selection

Multiple Choice

• 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....

• Continuous variation

• Discontinuous variation

Multiple Choice

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

• Discontinuous variation

• Continuous variation

Multiple Select

Which type of variation is represented by the graph? 

• ABO blood group

• Intelligence quotient (IQ)

• Heart rate

• Type of ear lobe 

Multiple Select

Choose the correct genetic factors which causes discontinuous variation.

• Mutation

• Random fertilisation of gametes

• Independent assortment of chromosomes during metaphase I

• crossing over during prophase I

Fill in the Blanks

Name the occurrence in the picture.

Fill in the Blanks

During metaphase I of meiosis, a homologous chromosome pair (one maternal chromosome and one paternal chromosome) is arranged

on the equatorial plane of a cell.

Fill in the Blanks

Fertilisation between sperm and secondary oocyte is random.

The above statement can be rephrase as

Multiple Choice

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

• mutation
• random fertilisation

• independent assortment

• crossing over

Multiple Choice

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......

• Genetic factor

• Environmental factor

Fill in the Blanks

In conclusion, differences in eating habits and environment while growing up produce

different

.

Multiple Select

Choose the dominant traits in humans.

• Presence of dimple

• Free earlobe

• Can roll the tongue

• Curly hair

Multiple Choice

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

• Mutagen

• Mutation

• Nondisjunction

Multiple Choice

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

• Mutagen

• Mutation

• Nondisjunction

Multiple Select

The types of gene mutations are...

• base substitution

• base deletion

• base insertion

Multiple Choice

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

• substitution

• deletion

• insertion

Multiple Choice

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

• Substitution

• Deletion

• Insertion

• Inversion

Multiple Choice

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

• Substitution

• Deletion

• Insertion

• Inversion

Fill in the Blanks

Point mutation is also known as

Multiple Select

Choose the example disease caused by gene mutation.

Multiple Choice

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

• TRUE

• FALSE

Multiple Choice

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 .......

• aberration

• mutation

• deletion

Multiple Choice

What situation causes a deletion?

• Part of the chromosome is missing

• Part of the chromosome breaks off and attaches to a different chromosome

Multiple Choice

What situation causes a duplication?

• Part of the chromosome breaks off and attaches to a different chromosome

• Part of a chromosome is duplicated 

Multiple Choice

What situation causes a translocation?

• Part of the chromosome breaks off, rotates 180^O and join again.

• Part of the chromosome breaks off and attaches to a different chromosome

Multiple Choice

What situation causes an inversion ?

• Part of the chromosome breaks off, rotates 180^O and join again.

• Part of the chromosome breaks off and attaches to a different chromosome

Fill in the Blanks

A change in chromosomal number causes a diploid organism to lose one or more chromosomes, or gain one or more chromosomes.

The change occurs when homologous chromosomes fail to separate during anaphase I in meiosis or sister-chromatids fail to

separate during anaphase II in meiosis.

This is probably because the normal ......... ......... fail to form during meiosis.

Multiple Choice

Non disjunction of chromosomes occurs during?

• Meiosis

• Mitosis

• Replication 

Multiple Select

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

• Jacob syndrome

• Klinefelter syndrome

• Turner syndrome

Multiple Choice

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

• Down

  Syndrome

• Cri du chat

  syndrome

Multiple Choice

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.

• TRUE

• FALSE