Meiosis creates: (1 point)
egg or sperm cells
egg or sperm cells
a fertilized egg
a fertilized egg
chromosomes for a fertilized egg from its mother and father
chromosomes for a fertilized egg from its mother and father
the cells of sexually reproducing organisms
the cells of sexually reproducing organisms
Biology B Semester Exam
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Question
The following list of events happens during meiosis:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate.
Anaphase I: Tetrads are separated.
Telophase I: Nuclear envelopes reform around the separated chromosomes.
Prophase II: Chromosomes condense.
Metaphase II: Chromosomes line up at metaphase plate.
Anaphase II: Sister chromatids separate into daughter chromosomes.
Telophase II: Nuclear envelopes reform around the daughter chromosomes.
Identify the answer choice that correctly lists the events from above that lead to new genetic combinations in the gametes.
(1 point)
5 and 6
5 and 6
5, 6, and 7
5, 6, and 7
1 and 2
1 and 2
1, 2, and 5
Biology B Semester Exam
3 of 303 of 30 Items
Question
Identify the mutation below that would be passed on to a living, fertile offspring if it happened in a parent.(1 point)
UV radiation exposure causes a mutation in a skin cell that results in the formation of cancer
UV radiation exposure causes a mutation in a skin cell that results in the formation of cancer
an insertion mutation in an egg cell that deactivates a gene for hair color, resulting in a viable error
an insertion mutation in an egg cell that deactivates a gene for hair color, resulting in a viable error
DNA replication errors that take place in somatic, or body, cells that are repaired by the cell
DNA replication errors that take place in somatic, or body, cells that are repaired by the cell
a chromosomal mutation that affects a sperm cell, deactivating a crucial gene involved in development
Biology B Semester Exam
4 of 304 of 30 Items
Question
An scientist observes a population of cheetahs on the plains in southern Africa and noticed that cheetahs have very little genetic variation. The scientists claims that the cheetahs are susceptible to extinction as a result of climate change. What is the name of the effect the scientist observed and why is it a concern ?(1 point)
Disaster effect, because the cheetahs have mutated to produce ineffective proteins
Disaster effect, because the cheetahs have mutated to produce ineffective proteins
Bottleneck effect, because it means most cheetahs could succumb to the same environmental stresses
Bottleneck effect, because it means most cheetahs could succumb to the same environmental stresses
Substitution mutation, because the these mutations cannot be passed to offspring
Substitution mutation, because the these mutations cannot be passed to offspring
Frameshift mutation, because it only produces ineffective proteins.
Biology B Semester Exam
5 of 305 of 30 Items
Question
Which of the following is least likely to produce genetic variation in the offspring of an individual?(1 point)
independent assortment of chromosomes during meiosis that creates a new combination of alleles in the gametes
independent assortment of chromosomes during meiosis that creates a new combination of alleles in the gametes
a cross over event during meiosis that creates a new combination of alleles in the gametes
a cross over event during meiosis that creates a new combination of alleles in the gametes
a DNA replication error caused by DNA polymerase in a body cell of the individual
a DNA replication error caused by DNA polymerase in a body cell of the individual
the random fertilization of an egg cell by a sperm cell during sexual reproduction
Identify the scenario that could potentially result in new combinations of DNA in the offspring of the individual.(1 point)
Sister chromatids fail to separate during anaphase of mitosis in a heart cell.
Sister chromatids fail to separate during anaphase of mitosis in a heart cell.
Exposure to UV radiation causes a mutation in a skin cell that is repaired by the cell.
Exposure to UV radiation causes a mutation in a skin cell that is repaired by the cell.
An error that happens during DNA replication in a cancerous lung cell during before mitosis.
An error that happens during DNA replication in a cancerous lung cell during before mitosis.
A pair of homologous chromosomes fails to separate during anaphase I of meiosis.
Biology B Semester Exam Unit 10 Lesson 2
1- egg or sperm cells
2- 1 and 2
3- an insertion mutation in an egg cell that deactivates a gene for hair color, resulting in a viable error
4- Bottleneck effect, because it means most cheetahs could succumb to the same environmental stresses
5- a DNA replication error caused by DNA polymerase in a body cell of the individual
6- A pair of homologous chromosomes fails to separate during anaphase I of meiosis.
7- polygenic
8- polygenic
9- provides a visual guide for abstract concepts
10- photosynthesis
11- in the cytoplasm; in the mitochondria
12- Biodiversity will decrease, and sustainability will decrease.
13- 1,000 kJ
14- 500
15- without oxygen.
16- halophiles
17- water chemistry
18- Protecting land
19- cornfield
20- the acid rain causes the snow to become darker, which increases snow melt.
21- advantageous trait → survival of the fittest→ differential reproduction → natural selection → evolution
22- natural selection; genetic drift
23- genetic makeup
24- A meerkat protects the offspring of its sister from an attack by hawks.
25- The species will become extinct since it cannot adapt to the changes fast enough.
26- The population must have genetic variation that leads to differential survival and reproduction.
27- Medium ground finches with small beaks survived multiple droughts.
28- No, because some mutations happen in body cells, so they are not passed on.
29- Correlation sometimes indicates causation.
30- It shows evidence of evolution.
It shows evidence of evolution.
100% 30/30 have a great summer and have a happy pride month
What the heck are the answers. Why is everything copied twice?
1. Meiosis creates: (1 point)
the cells of sexually reproducing organisms
a fertilized egg
chromosomes for a fertilized egg from its mother and father
egg or sperm cells
2. The following list of events happens during meiosis:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate.
Anaphase I: Tetrads are separated.
Telophase I: Nuclear envelopes reform around the separated chromosomes.
(1 point)
1, 2, and 5
5 and 6
1 and 2
5, 6, and 7
if you have all 30 answers post them here