What is the function of mRNA in protein synthesis?
คำตอบ
(B)
To carry the genetic code from the nucleus to the ribosome.
20
Which process results in cells with half the number of chromosomes as the parent cell?
คำตอบ
(C)
Meiosis
21
Which of the following processes contribute to genetic variation? (Select all that apply)
คำตอบ
A
B
22
Which of the following events occur during prophase of mitosis? (Select all that apply)
คำตอบ
A
B
D
23
What would be the result if cytokinesis did not occur after mitosis?
คำตอบ
A
B
24
Which type of RNA carries amino acids to the ribosome?
คำตอบ
(B)
tRNA
25
Which of the following is/are true about genes and chromosomes?
คำตอบ
A
B
C
26
If a man with hemophilia (an X-linked recessive disorder) has children with a woman who is a carrier, what is the probability that their daughter will have hemophilia?
คำตอบ
(B)
25%
27
What does the term "carrier" mean in genetics?
คำตอบ
(C)
An individual who carries a recessive allele but does not express the trait.
28
Which of the following are true about dominant alleles?
คำตอบ
A
D
29
During which phase of mitosis does the nuclear envelope reform?
คำตอบ
(D)
Telophase
30
What is the main purpose of a Punnett square?
คำตอบ
(B)
To predict the possible genotypes and phenotypes of offspring.
31
During what stage of meiosis does crossing over occur?
คำตอบ
(A)
Prophase I
32
Which of the following are components of a DNA nucleotide? (Select all that apply)
คำตอบ
A
B
C
33
What does the term 'haploid' refer to?
คำตอบ
(A)
A cell with half the number of chromosomes.
34
Which of the following is an example of multiple alleles?
คำตอบ
(A)
Human blood types
35
Which stage of mitosis is characterized by chromosomes aligning along the metaphase plate?
คำตอบ
(B)
Metaphase
36
Which of the following processes occurs during the S phase of interphase?
คำตอบ
(B)
DNA replication
37
What is the significance of the double helix structure of DNA?
คำตอบ
(A)
It allows for efficient replication.
38
What does the notation XX represent?
คำตอบ
(B)
Female
39
What is the role of the nuclear envelope during cell division?
คำตอบ
(A)
To protect the DNA
40
What are the processes that contribute to genetic variation in sexually reproducing organisms?
คำตอบ
B
C
D
41
What is the term for the process in which homologous chromosomes exchange genetic material?
คำตอบ
(B)
Crossing over
42
What is the expected genotypic ratio of offspring from a cross between a homozygous dominant individual and a heterozygous individual (e.g., AA x Aa)?
คำตอบ
(D)
4:0
43
What are the possible genotypes for a person with blood type A?
คำตอบ
A
D
44
What is the role of the stop codon?
คำตอบ
(B)
To signal the end of translation.
45
If a trait is X-linked recessive, who can express the phenotype?
คำตอบ
(C)
Both males and females
46
Which of the following are the roles of proteins in the body? (Select all that apply)
คำตอบ
A
B
C
47
What is the purpose of crossing over during meiosis?
คำตอบ
(C)
To create genetic variation.
48
In what part of the cell does translation occur?
คำตอบ
(C)
Cytoplasm
49
What happens to the number of chromosomes during meiosis?
คำตอบ
(C)
The number is halved.
50
What is the purpose of the testcross?
คำตอบ
(A)
To determine if an individual is homozygous or heterozygous for a dominant trait.
