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