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