Philippine Cultural College
Science Department
First Grading- Science 9
Quiz No. 1
Name: _________________________________
Grade &Section: G9__
Teacher: Mr. Jobeth P. Alonzo
I.
Matching Type: Match the following definitions to the correct vocabulary terms.
______ 1.) DNA
______ 2.) Gene
______ 3.) Chromosome
______ 4.) Phenotype
______ 5.) Genotype
II.
Score: _________________________
Date: _______________
Parent’s signature: _______________
A.) Condensed or compact “rod” of DNA that carries genetic information
B.) A segment of DNA that controls protein production
.
C.) Deoxyribonucleic Acid; helical molecule that carries the genetic .
information of an organism and is passed from parent to offspring.
D.) The observable traits of an organism (Physical traits)
E.) The genetic makeup of an organism.
Multiple Choice: Write the letter of the correct answer on the space provided before the
number.
_____ 1. A human being has _____ autosomes and ______ sex chromosomes.
a. 22, 1
b. 23 pairs, 1 pair
c. 22 pairs, 2 pairs
d. 22 pairs, 1 pair
_____ 2. Where are most genes in human, animal, fungal and plant cells found?
a. In the cell wall
c. In the cell membrane
b. In the cytoplasm
d. In the nucleus
_____ 3. Which among the following shows the correct pairing of nitrogenous bases?
a. Adenine – Guanine, Cytosine – Thymine
b. Adenine – Thymine, Cytosine – Guanine
c. Thymine – Guanine, Cytosine, Guanine
d. Cytosine – Adenine, Guanine – Thymine
_____ 4. A baby is XY for the gender or sex chromosome. That baby will be a ____________.
a. Boy
c. Girl
b. Puppy
d. Unidentifiable
_____ 5. Where are most of the sex-linked genes found?
a. XY chromosome
c. Y chromosome
b. X chromosome
d. XX chromosome
_____ 7. Which parental genotypes could produce females with color-blindness?
a. Normal-vision father, mother with color blindness.
b. Heterozygous normal-vision mother, father with color-blindness.
c. Homozygous normal-vision mother, father with color-blindness.
d. Normal-vision mother, normal-vision father.
_____ 8. Recombinant genes are produced when _________.
a. sex-linked genes are passed on to offspring
b. chromosome fail to segregate during crossing-over.
c. genes in one chromosome are transferred to other chromosomes during crossing-over.
d. chromosomes are defective.
_____ 9. DNA looks like a “twisted ladder”. If the “rungs” of the ladder are made up of nitrogenous
bases, what are the handrails or backbone of the ladder made up of?
a. Sugars and Salts
c. Phosphates
b. Sugars
d. Sugars and Phosphates
_____ 10. This basically any inheritance patterns that don’t follow one or more laws of Mendelian
genetics.
a. Non-mendelian Inheritance
b. Mendelian Inheritance
III.
Directions: Label the the following parts of the chromosome.
1.
2.
3.
4.
5.
6.
IV.
Directions: Use the punnett squares and information to answer the following questions.
(3 points each.)
Incomplete Dominance
1. Butterflies come in many different colors but some butterflies exhibit incomplete
dominance. The three colors that show this trait are blue (B), white (W) and light blue (BW).
a. Solve for the phenotypic and genotypic ratio of a white and light blue butterfly.
b. List the possible color of the offspring of the butterfly.
Answers:
a. Phenotypic Ratio:
Genotypic Ratio:
b.
Sex-linked Inheritance
2. Hemophilia is a sex-linked trait where XH gives normal blood clotting and is dominant to
the hemophilia allele Xh.
a. What if a woman who is a carrier of hemophilia marries a normal man and they decide to
have children? Solve for the phenotypic and genotypic ratio.
b. What is the probability that their children will be hemophiliac?
Answers:
a. Phenotypic Ratio:
Genotypic Ratio:
b.
Multiple Allelism
3. You are blood type O and you marry a person with blood type AB.
a. Complete a Punnett square for this cross and determine the phenotypic and genotypic
ratio.
b. List the possible blood types (phenotypes) of your offspring.
Answers:
a. Phenotypic Ratio:
Genotypic Ratio:
b.