bio 10
問題一覧
1
A comparison of sexual and asexual reproduction is made by a group of students. Which statements accurately support the argument that sexual reproduction is advantageous over asexual reproduction in many species?
Sexual reproduction involves meiosis and fertilization which leads to increased genetic variation in the offspring.
2
The images show sets of organisms and their offspring. Which of these offspring are a product of sexual reproduction?
3
3
What can be assumed about the parent cell if, after asexual reproduction, the daughter cell has 24 chromosomes?
The parent cell has 24 chromosomes.
4
In Bengal tigers, the allele for an orange coat is dominant to the allele for a white coat. If a homozygous recessive tiger is crossed with a tiger heterozygous for coat color, what is the percent probability that one of the offspring will be orange?
50%
5
In humans, cleft chins are coded by gene C, while non-cleft chins are coded by gene c. A male and female couple has a 25% chance of producing a child with a non-cleft chin and a 50% chance of producing children heterozygous for the trait. What are the genotypes of the male and female?
Cc and Cc
6
Progeria is a recessive disease caused impart by improper formation of the lamina proper. If a woman with progeria marries a heterozygous man, what is the chance that their second child will have progeria?
50%
7
A scientist observes a cell that has no cell wall, no nucleus, and no visible organelles. What kind of cell is the scientist observing?
Prokaryote
8
If two parents heterozygous for both traits cross, what would be the phenotypic ratio of the offspring?
9:3:3:1
9
Coat color in dogs is controlled in part by a gene that regulates the deposition of pigment. The patches of color in the dog shown in the figure are caused by a somatic mutation. The genotypes in the different patches are indicated. Which three statements are true about the mutation that caused the black coloring?
The mutation will affect only this dog., The mutation occurred in a body cell after the formation of the embryo., The mutation made a permanent change to the DNA of the affected cell.
10
After telophase I of meiosis, the chromosomal makeup of each daughter cell is
Haploid, and the chromosomes are each composed of two chromatids.
11
Diagrams 1 and 2 show cells from an organism with a diploid chromosome number of 4.
Which of the cells will be a diploid cell at the completion of division?
1
12
Diagrams 1 and 2 show cells from an organism with a diploid chromosome number of 4. Refer to the
illustration. Which of these cells is in the process of dividing to form gametes?
2
13
Which of these BEST describes the primary goal of meiosis?
Daughter cells are produced with only half the chromosomes of the parent cell.
14
A red-flowered plant is crossed with a white-flowered plant. Which offspring phenotype shows that flower color is an incompletely dominant trait in these plants?
Pink
15
What is the probability that a man who is heterozygous for blood type B and a woman with blood type AB could have a child with blood type O?
0%
16
A guinea pig breeder owns a pure-breeding black male (BB) and a pure-breeding white female (bb). What is the probability that offspring from these two guinea pigs will exhibit the black fur phenotype?
100%
17
Humans who are positive for the Rh blood type have an antigen on their red blood cells. Humans who do not have the antigen on their red blood cells are Rh negative. The Rh blood type is dominant to Rh negative. What is the probability that a child will be Rh negative if the parents are heterozygous for Rh?
25%
18
Four groups of organic compounds found in living organisms are proteins, carbohydrates, lipids, and nucleic acids. Which element is a main component in nucleic acids but not in the other three organic compounds?
Phosphorus
19
Organisms that reproduce sexually display a high frequency of genetic variation. Which two meiotic processes provide most of the genetic diversity of a species?
Independent assortment and crossing over
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問題一覧
1
A comparison of sexual and asexual reproduction is made by a group of students. Which statements accurately support the argument that sexual reproduction is advantageous over asexual reproduction in many species?
Sexual reproduction involves meiosis and fertilization which leads to increased genetic variation in the offspring.
2
The images show sets of organisms and their offspring. Which of these offspring are a product of sexual reproduction?
3
3
What can be assumed about the parent cell if, after asexual reproduction, the daughter cell has 24 chromosomes?
The parent cell has 24 chromosomes.
4
In Bengal tigers, the allele for an orange coat is dominant to the allele for a white coat. If a homozygous recessive tiger is crossed with a tiger heterozygous for coat color, what is the percent probability that one of the offspring will be orange?
50%
5
In humans, cleft chins are coded by gene C, while non-cleft chins are coded by gene c. A male and female couple has a 25% chance of producing a child with a non-cleft chin and a 50% chance of producing children heterozygous for the trait. What are the genotypes of the male and female?
Cc and Cc
6
Progeria is a recessive disease caused impart by improper formation of the lamina proper. If a woman with progeria marries a heterozygous man, what is the chance that their second child will have progeria?
50%
7
A scientist observes a cell that has no cell wall, no nucleus, and no visible organelles. What kind of cell is the scientist observing?
Prokaryote
8
If two parents heterozygous for both traits cross, what would be the phenotypic ratio of the offspring?
9:3:3:1
9
Coat color in dogs is controlled in part by a gene that regulates the deposition of pigment. The patches of color in the dog shown in the figure are caused by a somatic mutation. The genotypes in the different patches are indicated. Which three statements are true about the mutation that caused the black coloring?
The mutation will affect only this dog., The mutation occurred in a body cell after the formation of the embryo., The mutation made a permanent change to the DNA of the affected cell.
10
After telophase I of meiosis, the chromosomal makeup of each daughter cell is
Haploid, and the chromosomes are each composed of two chromatids.
11
Diagrams 1 and 2 show cells from an organism with a diploid chromosome number of 4.
Which of the cells will be a diploid cell at the completion of division?
1
12
Diagrams 1 and 2 show cells from an organism with a diploid chromosome number of 4. Refer to the
illustration. Which of these cells is in the process of dividing to form gametes?
2
13
Which of these BEST describes the primary goal of meiosis?
Daughter cells are produced with only half the chromosomes of the parent cell.
14
A red-flowered plant is crossed with a white-flowered plant. Which offspring phenotype shows that flower color is an incompletely dominant trait in these plants?
Pink
15
What is the probability that a man who is heterozygous for blood type B and a woman with blood type AB could have a child with blood type O?
0%
16
A guinea pig breeder owns a pure-breeding black male (BB) and a pure-breeding white female (bb). What is the probability that offspring from these two guinea pigs will exhibit the black fur phenotype?
100%
17
Humans who are positive for the Rh blood type have an antigen on their red blood cells. Humans who do not have the antigen on their red blood cells are Rh negative. The Rh blood type is dominant to Rh negative. What is the probability that a child will be Rh negative if the parents are heterozygous for Rh?
25%
18
Four groups of organic compounds found in living organisms are proteins, carbohydrates, lipids, and nucleic acids. Which element is a main component in nucleic acids but not in the other three organic compounds?
Phosphorus
19
Organisms that reproduce sexually display a high frequency of genetic variation. Which two meiotic processes provide most of the genetic diversity of a species?
Independent assortment and crossing over