Obavezno
1
Name the stage shown in the image alongside-
Name the stage shown in the image alongside-
Obavezno
1
What is true of the parent cell and daughter cells in mitosis? Why is this significant?
These two structures come together to make a chromosome-
Name the stage shown in the image alongside-
A cell that has 46 chromosomes undergoes mitosis. Which of the following is true?
Categorize the following images or descriptions to the correct phase. There could be a chance where a phase might not have any matching description and could be left blank in that case.
Replication of DNA takes place here.
Cells increase in size to accommodate more organelles and DNA.
Centrioles start to move towards the opposite poles.
Item 1
Nuclear membrane and nucleolus reappears
The sister chromatids are pulled by the spindle fibers and move away.
Interphase
Prophase
Metaphase
Anaphase
Telophase
A scientist has discovered a mutation (sudden change) that prevents cells from passing to anaphase of mitosis. Of the following options, which is the most likely to happen?
Which of the following statements about mitosis is NOT correct?
Identify the image alongside.
One of these events does not take place during meiosis-
Name the event wherein the paternal and maternal chromosomes change their material or exchange the parts with each other in cell division-
Match the stages with their characteristics-
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Sister chromatids of recombinant chromosomes separate and move towards poles | arrow_right_alt | Prophase-I |
Cytoplasm divides and separates the two daughter cells | arrow_right_alt | Anaphase-I |
Pairing up of the homologous chromosomes | arrow_right_alt | Cytokinesis |
Homologous chromosomes separates and moves apart | arrow_right_alt | Anaphase-II |
Drag and drop the description to the category that it belongs to.
Two daughter cells with haploid number of chromosomes is formed.
Centrioles move towards the poles.
Nucleolus and nuclear membrane disappear.
Homologous chromosomes (pair) align at the equator.
Crossing over occurs here.
Four daughter cells with haploid number of chromosomes is formed.
Meiosis-I
Meiosis-II
Both Meiosis-I and Meiosis-II
Match the image with the correct phase name-
Anaphase-I | Anaphase-II | Metaphase-I | Crossing Over | |
|---|---|---|---|---|
| ||||
| ||||
| ||||
|
The number of chromosomes in muscle cells of a rat are 42. What will be the number of chromosomes in its gametes.
Haploid gametes have ......# of chromosomes whereas Diploid cells have .....# of chromosomes
Why is crossing-over important?
The percentage of cytosine in a DNA molecule is 20%. What will be the total percentage of Adenine. (Use Chargaff's rule)
Provide the mRNA strand to this DNA sequence: T A C G C C A G T
According to the genetic code, what is coded by codon CAA?
Write the complementary mRNA base sequence to the following... (Type in all caps and no spaces)
AATGCTACTCTT
Transcription occurs in the ................. part of the cell
The DNA has sequences that code for RNA and there are some that do not code for RNA.
The sequences that are meaningful and code for RNA are called ......and the ones that are meaningless and does not code for RNA are called.......
Use the Image below to match the columns
Template Strand | Coding Strand | 5' | 3' | DNA Polymerase | |
|---|---|---|---|---|---|
A | |||||
D | |||||
C |
In DNA replication, DNA "unwinds" to form two template strands: the leading strand and the lagging strand.
Which of the following statements about these strands is TRUE?
The functions of the DNA polymerase enzyme is/are (Check all that apply)
A codon has ....... number of nucleotides.
The chemical bond between two amino acids is called-
If a man has blood type O and his wife has blood type AB, what blood types are possible among their children?
If a type heterozygous A man marries a heterozygous type B woman, what blood types could occur in their children? Select all that are possible.
In radishes, red (R) and white (W) are pure-breeding colors, while hybrids are purple (RW). If a red radish is crossed with a purple radish, what will be the phenotype of the offspring? Show the Punnett Square and percentage of each phenotype.
In Andalusian fowls, black individuals (B) and white individuals (W) are homozygous. A homozygous black bird is crossed with a homozygous white bird. The offspring are all purple (BW). Predict the ratio of Black: White: Purple when Purple fowls and crossed with black.
Match the example on the right as either incomplete dominance or codominance or neither.
black x white chickens --> Black and white speckled (Erminette)
red roses x white roses --> pink
purple x white --> purple flowers
curly x straight --> wavy hair
more men than women are hemophiliacs
roan cattle have red and white hairs mixed
Incomplete Dominance
Codominance
Neither
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
In buffalo, being boring (B) is dominant to being busy (b). A true-breeding, busy male is crossed with a true-breeding/pure, boring female.
What are the possible genotypes of their offspring?
In sheep, the allele for belly fur (A) is dominant to the allele for no belly fur (a). A mother with the genotype Aa and a father with the genotype Aa produce an offspring. What is the percent chance that the offspring will have NO belly fur?
B = brown eyes
b = blue eyes
One brother has genotype BB and the other brother has genotype Bb.
Which statement is true about these two brothers?
In guinea pigs, black hair (B) is dominant to brown hair (b) and short hair (H) is dominant to long hair (h). A heterozygous black, long-haired guinea pig is crossed with a brown, homozygous short-haired guinea pig . How many offspring will be-
a) black with long hair
b) brown with short hair?
(Show with the help of a Punnett square)
Which of the following methods will provide information to an ecologist about both the size and density of a population?
What type of growth curve is shown below-
On the graph "M" represents the ........which is ...........
Large number of small off springs that are adapted to unstable and unpredictable environments are-
Match the type of interaction with its example.
Predation | Commensalism | Parasitism | Mutualism | |
|---|---|---|---|---|
Barnacles on Whales | ||||
Mosquito biting humans | ||||
Bee and flower | ||||
Snake eating Frog | ||||
Egret bird feeding on insects at back of cattle |
According the image below Canada's population is showing _______________ type of growth
What does C in the secondary succession image below called-
Of the following, which is NOT part of Darwin's theory of natural selection?
What mechanism of evolution is shown below-
In which theory of speciation does a new species emerge from within the geographic range of its ancestor?
Some organisms have features that have different functions, but similar structures. One example is the forelimb of humans, dogs, birds, and whales.
How do fossils support evolution?
Which of the following is an example of a vestigial structure?
This system contains the largest organ of the body.
The proteins are broken down to produce ..........waste which is removed by .........system
Heart is a/an ........in the circulatory system that helps in ...........
The structures found in the small intestines that helps in increasing the surface area for absorption are-
Emilio was teaching his friend Trinity about the structures that are helpful in exchanging the gasses in animal body. He taught one thing that was incorrect about gaseous exchange. Based on your understanding identify which out of the following is INCORRECT about gaseous exchange that he taught his friend.
Following are the roles/functions of the cells (Check all that apply)
The neurons are the longest cells in an animal's body. They help in-
What made you choose your answer in the previous question?
The reason for the choice of your answer in previous question is-
What is the amino acid sequence for the following sequence? T A C G C C A G T
