Question 1(multiple choice worth 3 points) (06.04 lc) which of the following is true about repetition in an experiment? it involves setting up of a hypothesis. it involves multiple trials. it involves data analysis. it involves peer review. question 2(multiple choice worth 3 points) (06.03 mc) the trait for flower color in a plant has red and white alleles. the red color is the dominant trait. what is the phenotypic ratio for a cross between plants with red (rr) flowers and white (rr) flowers? 4 red : 0 white 3 red : 1 white 2 red : 2 white 0 red : 4 white question 3(multiple choice worth 3 points) (06.01 mc) the following table describes some biotechnological processes. biotechnological processes process description 1 producing offspring that have identical dna as one parent 2 crossing a high-yielding fruit variety with a high-vitamin variety which biotechnological processes are described in the table? both processes describe cloning. both processes describe genetic engineering. process 1 describes cloning and process 2 describes artificial selection. process 1 describes artificial selection and process 2 describes cloning. question 4(multiple choice worth 3 points) (05.04 mc) which of the following adaptations best polar bears walk on snow? furry feet slippery feet small feet white-colored feet question 5(multiple choice worth 3 points) (06.01 hc) a team of scientists altered the dna of e. coli bacteria. the bacteria thus developed had the ability to generate insulin exactly identical to the human insulin molecule. what could be the likely impact of this biotechnology on the individual and the society? the medical costs for insulin-dependent patients would rise. large-scale insulin could be produced in relatively lesser time. the price of insulin available from sources other than bacteria may fall. the patients who take insulin may become infected with e. coli bacteria. question 6(multiple choice worth 3 points) (06.03 lc) which of the following is used to represent a recessive trait in a punnett square? an uppercase letter a lowercase letter a shaded square a shaded circle question 7(multiple choice worth 3 points) (06.03 mc) cystic fibrosis is a recessive gene disorder. the pedigree chart for a family known to have cystic fibrosis is shown below. a half shaded circle is shown connected by a straight line to an unshaded square. underneath the half shaded circle are the letters aa which represent the genotype for the first parent. underneath the second parent the letters, aa, appear representing the genotype for the other parent. below this is another row of circles and squares. this 2nd row represents the offspring. starting from the left a half shaded circle is shown connected to an unshaded square, followed by an unshaded square, and then an unshaded circle. each of the circles and squares, offspring, are connected by a horizontal straight line that connects to the parent group above. the genotype is written under each of the offspring in order from left to right; aa, aa, aa, aa. what percentage of the offspring have observable disease? 0% 25% 50% 75% question 8(multiple choice worth 3 points) (06.03 lc) which of the following is an example of a homozygous recessive allele? rr rr rr rw question 9(multiple choice worth 3 points) (06.03 mc) the pod color in pea plant can be yellow or green. a pea plant with yellow pods (yy) is crossbred with another pea plant with green pods (yy). what is the probability of offspring with green pods? 0% 25% 50% 75% question 10(multiple choice worth 3 points) (06.02 mc) a pea plant has white flowers. it has a genotype pp. which of the following about the gene of flower color in the pea plant is true? the allele for white flowers is dominant in the pea plant. the allele for white flowers is recessive in the pea plant. the plant received both dominant alleles from both the parents. the plant received a dominant and a recessive allele from each parent. the characteristics of certain cell divisions are described in the following table. cell division characteristics characteristic description 1 forms diploid cells 2 creates sex cells, or gametes which type(s) of cell division do the two characteristics represent? both characteristics represent meiosis. both characteristics represent mitosis. characteristic 1 represents meiosis and characteristic 2 represents mitosis. characteristic 1 represents mitosis and characteristic 2 represents meiosis.
Answers
1. It involves multiple trials
2. 2 red: 2 white
3. Process 1 describes cloning and process 2 describes artificial selection
4. Furry Feet
5. Large scale insulin could be produced in relatively lesser time
6. A lowercase letter
7. 0%
8. rr
9. 50%
10. The allele for white flowers is recessive in the pea plant
Explanation:
1. Repetition, this means to do over and over. This would involve multiple trials and this is done to test the reliability of the results and determine if the hypothesis holds true or not.
2. If you put your cross in a Punnett square it would look like this:
R r
r Rr rr
r Rr rr
Based on your problem: R = red; r = white
If the genotype would have a dominant allele (R), then the dominant trait will come out, if it has only recessive alleles (r) then the recessive trait will come out. So as you can see there are 2 red and 2 white. So the ratio would be 2:2 or 1:1.
3. Process 1 is considered as cloning, and to be more specific, reproductive cloning. The aim of this is to produce an offspring that has the same genetic make up as the original or parent organism. Process 2 is an example of artificial selection. This is also known as selective breeding where breeders choose certain traits to pass on to the off springs by selecting the organisms that have the traits desired.
4. Furry feet of polar bears provide them extra traction when they walk on snow. The fur also provides extra warmth. They also have foot pads on the soles of their feet that help them as well. Together, polar bear have something that works like snow boots.
5. Large-scale insulin could be produced in relatively lesser time because bacteria reproduce through asexual means. They produce copies of themselves that are genetically identical. An advantage of asexual reproduction is the process occurs in a much faster rate. With that said, insulin supply would increase, which will help many diabetic patients.
6. Recessive alleles in a genotype are represented by a lowercase letter. On the other hand, dominant alleles are represented by a capital letter. Squares and circles are used in pedigree charts to represent the whole genotype of an organism for a specific trait.
7. The answer would be 0% because cystic fibrosis is a RECESSIVE gene disorder. For it to be expressed or observable in an individual , they should have two recessive alleles. As you can see in the end result, none of the offsprings have 2 recessive alleles. The genotype Aa, has a recessive allele, but it will not be expressed because the dominant trait will mask it.
8. When we talk about homozygous, this means the alleles are the same. And when you say heterozygous, this means that the organism would have a dominant and recessive allele. the recessive llele is represented by a lowercase letter. So if the organism is homozygous recessive, the genotype would have two lowercase letters. (rr)
9. The scenario shows the genotype is pp. This means that the pea plant is homozygous recessive. As explained before, recessive traits are represented by lowercase letters. So this would mean that the white color is a recessive trait. The answer would then be the allele for white flowers is recessive in the pea plant.
10. Mitosis and meiosis are both forms of cell division. Mitosis produces daughter cells that are exactly the same as the parent cell, while Meiosis produces daughter cells that are different. They produce what we call haploid cells, which has only half the chromosomes of the parent cell. Gametes or sex cells are produced through meiosis, while body cells are produced through mitosis.
2%? i tried finding the exact sorry if it's not 100% correct ; -;
the endomembrane system i think
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