Meiosis and intro to Genetics Quiz


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Heterozygous is when…
A. the alleles are the same
B. the alleles are different
C. the alleles are absent
D. the alleles are present


What is it called when a sperm and egg meet?
A. meiosis
B. fertilization
C. cell division
D. mitosis


What is a phenotype
A. The genetic make up (code)
B. The physical trait


What is one reason why we need meiosis?
A. To double the number of chromosomes going into sex cells
B. To halve the number of chromosomes going into sex cells
C. To triple the number of chromosomes going into sex cells
D. To not change the number of chromosomes going into sex cells


Which of the following genotypes is homozygous dominant?
A. A
B. Aa
C. AA
D. aa


Compared to the number of chromosomes contained in a body cell, how many chromosomes would normally be contained in a gamete?
A. The same number
B. One-fourth as many
C. Twice as many
D. Half as many


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


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


A human usually has ______ chromosomes in their body cells.
A. 6
B. 22
C. 4
D. 46


which choice best represents the genotype of this cross?
A. 1 Yy: 2 yy: 0 YY
B. 2 Yy: 2 yy: 0 YY
C. 3 Yy: 1 yy: 0 YY
D. 1 Yy: 3 yy: 0 YY


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


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


In a heterozygous genotype, the ___________ allele takes over in the phenotype.
A. recessive
B. dominant
C. lower case letter
D. both 


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.


What kind of genotype has 2 recessive alleles

A. homozygous dominant

B. heterozygous

C. homozygous recessive

D. heterozygous recessive


What percentage of the female offspring will be a carrier for this recessive disease?
A. 0%
B. 50%
C. 100%
D. 25%


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


Why were pea plants perfect a study on Heredity?

A. Pea plants were easy to care for and produced many offspring

B. The Traits were distinct and easy to identify

C. One gene controlled one trait. (i.e. it was simple)

D. All of These


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%


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


Which of the following is NOT a genotype?
A. heterozygous
B. a trait
C. Bb
D. homozygous recessive


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


Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
A. 0%
B. 25%
C. 50%
D. 75%


Is it possible for a female to express a Y-Linked trait, and why or why not?

A. Yes, Because they have room on their X Chromosome for it

B. Yes, Because they can take it from the father

C. No, Because the copy on their X Chromosome will overpower the copy on their Y chromosome

D. No, Because they lack a Y chromosome


What do we call the table used to calculate the probability of an offspring’s genotype?
A. Punnett square
B. Venn diagram
C. Golden ratio
D. Fibonacci sequence




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