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Genetics (ICSE Biology)

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.
The result of meiosis is:
a)
two diploid cells
b)
two haploid cells
c)
four diploid cells
d)
four haploid cells
2.
The purpose of meiosis is to form ________ cells.
a)
body
b)
sex
c)
somatic
d)
brain
3.

The chromosomes that pair up during meiosis, are called __________ chromosomes.

a)

heterozygous

b)

asexual

c)

homologous

d)

gene

4.
Which of the following is NOT a gamete (sex cell)?
a)
egg
b)
sperm
c)
skin cell
d)
all of the above are gametes
5.

Which of the following statements is true of homologous chromosomes?

a)

They are exact copies.

b)

They contain the same genes.

c)

They divide during meiosis II.

d)

They connect to each other.

6.

Which phrase best describes the process of meiosis?

a)

occurs in body cells

b)

results in genetically identical cells

c)

happens only in haploid cells

d)

produces haploid gametes

7.

Hair color and eye color are examples of a person’s

a)

recessive traits

b)

dominant alleles

c)

genotype

d)

phenotype

8.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
9.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
10.

In genetics, dominant alleles are usually represented by

a)

capital letters

b)

lower case letters

c)

math symbols

d)

fractions

11.

When an organism has two different alleles, it's called

a)

purebred

b)

dominant

c)

heterozygous

d)

recessive

12.

What do the letters inside the grid of a Punnett square represent?

a)

phenotypes of parents

b)

genotypes of offspring

c)

testcrosses of offspring

d)

chromosomes of parents

13.
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
14.

If a pea plant were homozygous recessive for height, how would its alleles be represented?

a)

Tt

b)

TT

c)

tt

d)

tT

15.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
16.
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%
17.
The result of meiosis is:
a)
two diploid cells
b)
two haploid cells
c)
four diploid cells
d)
four haploid cells
18.
The purpose of meiosis is to form ________ cells.
a)
body
b)
sex
c)
somatic
d)
brain
19.

A human body cell contains:

a)

46 chromosomes

b)

23 chromosomes

c)

21 chromosomes

d)

40 chromosomes

20.

A human sex cell contains:

a)

46 chromosomes

b)

23 chromosomes

c)

46 pair chromosomes

d)

20 chromosomes

21.

The genetic make-ip of an organism is its

a)

genotype

b)

phenotype

22.

Gamete carry...

a)

double copies of a gene

b)

triple copies of a gene

c)

a single copy of a gene

23.

Separation of alleles during meiosis is

a)

segregation

b)

fertilzation

c)

gametes

24.

The process of passing on traits from parents to offspring is called:

a)

heredity

b)

ability

c)

skills

d)

reproduction

25.

What causes genetic variation in meiosis?

a)

chromosomes lining up

b)

crossing over of homologous chromosomes

c)

separation of chromosomes

d)

chromosomes pulling apart

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