1. The haploid number refers to the number of ________. A) chromosome pairs B) c
ID: 134841 • Letter: 1
Question
1.
The haploid number refers to the number of ________.
A)
chromosome pairs
B)
chromosomes
C)
sperm and ova
D)
genes
2.
What is the diploid number in humans?
A)
9
B)
18
C)
23
D)
46
3.
________ is the union of haploid male and female gametes to form a diploid zygote.
A)
Synapsis
B)
Interkinesis
C)
Fertilization
D)
Crossing over
4.
The physical exchange of genetic material between homologous chromosomes is known as __________.
A)
synapsis
B)
crossing over
C)
nondisjunction
D)
bivalency
5.
Meiosis consists of _____ distinct nuclear division(s).
A)
one
B)
two
C)
three
D)
four
6.
In animals, mature male gametes are called ________.
A)
spermatogonia
B)
spermatids
C)
spermatozoa
D)
primary spermatocytes
7.
During ________, the homologous chromosomes separate and migrate toward opposite poles.
A)
telophase I
B)
telophase II
C)
anaphase I
D)
interkinesis
8.
Which of the following aneuploid conditions involves chromosome 21?
A)
Edward syndrome.
B)
Klinefelter syndrome.
C)
Patau syndrome.
D)
Down syndrome.
9.
Which of the following are haploid?
A)
Secondary spermatocytes.
B)
Spermatids.
C)
Spermatozoa.
D)
All of the above.
10.
Unlike mitosis, meiosis ensures that _________.
A)
genetically unique daughter cells are produced
B)
the same number of chromosomes is passed to the next generation
C)
there is genetic variation in the species
D)
all of the above
11.
Who is considered the “father of genetics”?
A)
Gregor Mendel.
B)
Reginald Punnett.
C)
James Watson.
D)
J. B.S. Haldane.
12.
Genes occur in pairs called _______.
A)
bivalents
B)
analogs
C)
homologs
D)
alleles
13.
According to the law of ________, during the formation of gametes, the alleles responsible for each trait separate so that each gamete contains only one allele for that trait.
A)
allocation
B)
integration
C)
segregation
D)
separation
1.
The haploid number refers to the number of ________.
A)
chromosome pairs
B)
chromosomes
C)
sperm and ova
D)
genes
Explanation / Answer
1) The correct option is C. sperm and ova.
Human haploid gametes such as egg and sperm have 23 chromosomes.
2) The correct option is D. 46.
Human diploid cells have 46 chromosomes.
3) The correct option is C. Fertilization.
The process of fertilization is the fusion of male gametes such as sperm and female gametes such as egg, which form the diploid zygote.
4) The correct option is B. crossing over.
Crossing over is the process where homologous chromosomes exchange different segments of their genetic material and form recombinant chromosomes. It occurs between prophase 1 and metaphase 1.
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