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