Variation Biology F5 KSSM Chapter 12

Variation

by ROSLINDA Moe

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.

-A spectrum of phenotype is observed.

The above statement describes....

• Continuous variation

• Discontinuous 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

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

Multiple Select

Choose the dominant traits in humans.

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

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

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