Medical Quiz

Meiosis and intro to Genetics Quiz


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What is the probability of heterozygous offspring?
A. 25%
B. 50%
C. 0%
D. 100%


Aa, DD, bB, yy are all examples of
A. genotypes
B. phenotypes


Crossing over helps promote 
A. male genotype
B. genetic variation
C. DNA replication
D. mitosis


If a trait shows up more commonly in men than women it is probably
A. not inherited
B. on the x chromosome and dominant
C. on the x chromosome and recessive
D. on a normal body chromosome


What is the phenotype of the offspring? (A-Brown hair; a-blond hair)
A. 50 % Brown Hair and 50% Blond Hair
B. 25 % Brown Hair and 75% Blond Hair
C. 75 % Brown Hair and 25% Blond Hair
D. 0% Brown Hair and 100% Blond Hair


What do we call the result of the genotype (for example, the color of the peas)?
A. Visible traits
B. Physiotrait
C. Genotype 2
D. Phenotype


If B = brown hair and b = blonde hair, what is the probability of brown hair?
A. 25%
B. 50%
C. 0%
D. 75%


Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?
A. 0%
B. 25%
C. 50%
D. 100%


What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
A. 0 in 4
B. 1 in 4
C. 2 in 4
D. 4 in 4


A male shark has 40 chromosomes in each of its sex cells. How many would be present in its body cells?
A. 20
B. 40
C. 80
D. 160


Dominant alleles are-
A. capital
B. lowercase
C. both
D. neither


Who is Gregor Mendel

A. an Austrian Monk from the mid 1800s who contributed to the study of Genetics

B. The scientist who discovered the structure of DNA

C. a British scientist who discovered penicillin

D. The scientist who used X-Ray Crystallography to shed light on the structure of DNA


When we say that a woman is a carrier for a genetic disease or disorder it means that
A. she has 1 gene, but not the disorder
B. she has 2 genes for the disorder
C. she can pass the gene only to male children
D. she can pass the gene only to female children


What was Mendel’s first conclusion?

A. Pea plants were inheriting a pair of genetic instructions from both parents.

B. Pea plants were inheriting genetic instructions from their grandparents.

C. Pea plants were inheriting genetic instructions only from their maternal parent.

D. Pea plants were inheriting genetic instructions only from their paternal parent


What kind of genotype has 2 recessive alleles

A. homozygous dominant

B. heterozygous

C. homozygous recessive

D. heterozygous recessive


G = green, g = yellow
The genotype for a yellow plant is…
A. GG
B. Gg
C. gg
D. all of the choices result in yellow


The chromosomes that pair up during meiosis, are called __________ chromosomes.  
A. homozygous 
B. asexual
C. homologous
D. genes


What specifically about Pea Plants did Mendel Study?

A. Color of Pea Flower

B. Colors of individual Peas

C. Texture of Peas

D. All of these


Colorblindness is a sex-linked recessive disorder. If the daughter of a couple is colorblind, what are the two possible genotypes of her mother?

a. XAXA and XAXa
b. XAXAand XaXa
c. XAXaand XaXa
d. Cannot be determined

Mendel’s Law of Segregation means?

A. Every person has two alleles for each trait, they segregate from each other and the dominant is passed more often.

B. Every person has two alleles for each trait, Where two traits are being passed, they do not effect each other.

C. Every person has two alleles for each trait, they segregate from each other and are passed down at random.

D. Every person has two alleles for each trait, they segregate from each other and the recessive is passed more often.


Males are more likely to suffer from a sex-linked disease or disorder because
A. males are the weaker sex
B. males have less DNA
C. males have 1 X chromosome, so the disorder is more likely to be expressed


The sex of a child is determined by
A. whether the father’s sperm contains an x or y chromosome
B. whether the mother’s egg contains an x or y chromosome
C. the age of the parents


What did Gregor Mendel study?

A. Mold Spores

B. Pea Plants

C. Sun Flowers

D. Rats


Recessive alleles are-
A. capital
B. lowercase
C. both
D. neither


Which of the following genotypes belongs in the red box in the Punnett square?

a. XBXb
b. XbXb
c. XbY
d. XBY



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