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