WorksheetsTEST WEEK 10
Total questions: 25
Worksheet time: 24mins
Cystic fibrosis is an autosomal recessive disease .
Study the pedigree what are the possible genotypes of #10? (more than one answer)
AA
Aa
aa
XAXa
A population of 1200 butterflies shows the following genotypes:
RR = 480, Rr = 600, rr = 120.
What is the frequency of allele R?
0.684
0.700
0.550
0.600
In a population of 800 frogs, the distribution is:
GG = 500, Gg = 200, gg = 100.
What is the genotype frequency of gg (to 3 decimal places)?
0.125
0.100
0.250
0.500
Process A is (a) , while Process B is (b)
Total recombinant offspring =
301
298
4032
8067
Arrange the steps of DNA replication in the correct order:
Unwinding of DNA helix
RNA primer synthesis
DNA strand elongation
Primer removal
Okazaki fragment joining
How many chromosomes are in each of the wallabies' gametes?
10
20
5
7
The start codon for translation is always (a) , which codes for the amino acid (b) .
Organize these options into the right categories
RNA polymerase binds to DNA
Ribosome binds to mRNA
Codon–anticodon pairing
mRNA synthesized
Look at Cell 1 in Figure 1. Name the structure labelled C
(a)
Cell 2 is in which stage of cell division?
(a)
In Vaness’s DNA, a codon mutates from GCU to GCC, but the amino acid remains alanine. Which is correct?
Missense mutation
Silent mutation
Frameshift mutation
Nonsense mutation
Farid is diagnosed with trisomy 21. Which statement is correct?
has 45 chromosomes
has 47 chromosomes with an extra chromosome 21
has Turner syndrome
has Klinefelter syndrome
Syasya has a family history of hemophilia. She is a carrier (XᴴXʰ) and marries a normal male (XᴴY). Which is correct?
All daughters will have hemophilia
50% of sons may have hemophilia
All sons will be healthy
None of the daughters can be carriers
Mutation 1 DNA sequence:
3′ – TAC GAC GGT TTT GCA TT – 5′
Protein effect?
Non-functional protein
Functional protein
Identical protein
Mutation 1 DNA sequence:
3′ – TAC GAC GGT TTT GCA TT – 5′
Effect of mutation?
Frameshift
Missense
Nonsense
Silent
A student drinks a glass of milk. Which of the following BEST describes what happens in their bacteria (E. coli)?
Allolactose binds to repressor, operon turns on, enzymes for lactose digestion are produced
Repressor stays bound to operator, transcription is blocked
RNA polymerase cannot find the promoter
No enzymes are produced at all
Match the gene with its enzyme product:
lacZ
β-galactosidase
lacY
permease
lacA
transacetylase
RNA polymerase binds to the (a) to start transcription.
When lactose is present, (a) binds to the repressor.
The enzyme responsible for forming molecule A is:
(a)
Amino acid C in Figure 2 is (a)
The point where non-sister chromatids exchange genetic material is called a (a) .
During meiosis I, homologous chromosomes pair up in a process called (a) .
Ganti kelas Jumaat kepada hari Khamis.
Choose ONE or MORE
8.15am-9.15am
11.15am-12.15pm
12.15pm-1.15pm
