DE Unit-7 Exam

Last updated 4 months ago

21 questions

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Library

DE Unit-7 Exam

Last updated 4 months ago

21 questions

Required

1

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1

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4

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One of these events does not take place during meiosis-

Production of genetically identical daughter cells.

Crossing over

Synapsis-pairing up of homologous chromosome

Separation of sister chromatids that are recombinant.

Production of genetically different daughter cells.

The meiotic division forms-

A cell undergoes Meiosis I with no crossing over between homologous chromosomes. Which outcome is most likely?

Increased genetic variation in gametes

Gametes with identical chromosomes to the parent

Reduced genetic variation among gametes

Failure of homologous chromosomes to separate

A lot of Independent assortment

Name the event wherein the paternal and maternal chromosomes change their material or exchange the parts with each other in cell division. Which phase does it happen?

Drag and drop the description to the category that it belongs to.

Homologous chromosomes align at the equator.
Nucleolus and nuclear membrane disappear.
Crossing over occurs here.
Two daughter cells with haploid number of chromosomes is formed.
Centrioles move towards the poles.
The sister chromatids of recombinant chromosomes move apart
Followed by Cytokinesis
Four daughter cells with haploid number of chromosomes is formed.

Meiosis-I
Meiosis-II
Both Meiosis-I and Meiosis-II

A student claims that crossing over is unnecessary because independent assortment alone creates genetic diversity. Which statement best evaluates this claim?

The claim is correct because independent assortment produces all possible allele combinations

The claim is incorrect because crossing over creates new allele combinations on the same chromosome

The claim is correct because crossing over only occurs in mitosis

The claim is incorrect because independent assortment does not occur in meiosis

The claim is incorrect because homologous chromosomes does not show synapsis before crossing over

Match the image with the correct phase name-

The number of chromosomes in muscle cells of a coyote are 78. What will be the number of chromosomes in its sperms.

Haploid gametes have ......# of chromosomes whereas Diploid cells have .....# of chromosomes

Which of the following best describes Non disjunction?

Chromatin does not condense and change to chromosomes

All chromosomes are unaffected.

Chromosomes replicate too many times.

Extra chromosomes are removed.

Inability of chromosomes to separate properly.

The risk of non disjunction increase with-

Homologous chromosomes showing lesser synapsis

Increasing age of parents

Decreasing age of parents

Sister chromatids spending more time in Telophase-I

Eating healthier food

One difference between Autosomes and sex chromosomes humans is-

Autosomes is 1 pair and sex chromosomes are-22 pairs

Autosomes are-22 pairs and Sex chromosome is-1 pair

Autosomes are found in males and Sex chromosomes are in females

Autosomes are-10 pairs and rest 13 are Sex chromosome 

Autosomes and sex chromosomes are same there is no difference

How does independent assortment affect genetic variation?

Makes offspring identical to parents.

Increases variation among offspring from sexual reproduction.

Makes gametes identical to each other

Has no effect on variation.

Reduces genetic diversity in populations.

What purpose does a karyotype serve in genetics?

Which statements correctly describe chromosomes during metaphase II? (Check all that apply)

Chromosomes align in the middle of the cell on the spindle fibres

Centromeres divide at this stage

Homologous chromosomes align as tetrads at the metaphase plate

Chromosomes align independently of their homologs

Each chromosome consists of two sister chromatids joined at the centromere

Sister chromatids may be genetically non-identical

If nondisjunction occurs during anaphase II of one daughter cell, which outcomes are possible in the resulting gametes? (Check all that apply)

Two normal haploid gametes

All gametes affected equally

Synapsis could be one of the results

Down's syndrome could be one of the examples

Gametes with identical chromosome numbers but different alleles

One gamete with an extra chromosome

One gamete missing a chromosome

What are the similarities between meiosis I and meiosis II?

Rearrange the events in Meiosis-I in the correct order

The two haploid daughter cells completely divides and is ready to go next.
The recombinant chromosomes move apart.
Synapsis occurs.
The homologous chromosomes exchange their parts.
The Homologous pairs of chromosomes line up at the equator/middle.
The nucleolus and the nuclear membrane reappears.

Categorize the following description to correct category

Contains two set of chromosomes
Contains single set of chromosomes
Example is a Liver cell
Example is a sperm
Somatic cell
Gamete

Haploid
Diploid

Identify the phase in the image alongside.

The reason for the choice of your answer in previous question is-

Sister chromatids are separating.

Homologous chromosomes are at the equator/middle.

Sister chromatids are aligned at the equator.

Homologous chromosomes are separating.

Homologous chromosomes are crossing over.

One of these events does not take place during meiosis-

Production of genetically identical daughter cells.

Crossing over

Synapsis-pairing up of homologous chromosome

Separation of sister chromatids that are recombinant.

Production of genetically different daughter cells.

The meiotic division forms-

Prokaryotic cells

Gametes

Somatic cells

Eukaryotic cells

Muscle cells

A cell undergoes Meiosis I with no crossing over between homologous chromosomes. Which outcome is most likely?

Increased genetic variation in gametes

Gametes with identical chromosomes to the parent

Reduced genetic variation among gametes

Failure of homologous chromosomes to separate

A lot of Independent assortment

Name the event wherein the paternal and maternal chromosomes change their material or exchange the parts with each other in cell division. Which phase does it happen?

Crossing over, Prophase-II

Synapsis, Prophase-I

Tetrad, Prophase-II

Crossing over, Prophase-I

Homologous chromosome, Prophase-I

Drag and drop the description to the category that it belongs to.

Homologous chromosomes align at the equator.

Nucleolus and nuclear membrane disappear.

Crossing over occurs here.

Two daughter cells with haploid number of chromosomes is formed.

Centrioles move towards the poles.

The sister chromatids of recombinant chromosomes move apart

Followed by Cytokinesis

Four daughter cells with haploid number of chromosomes is formed.

Meiosis-I

Meiosis-II

Both Meiosis-I and Meiosis-II

A student claims that crossing over is unnecessary because independent assortment alone creates genetic diversity. Which statement best evaluates this claim?

The claim is correct because independent assortment produces all possible allele combinations

The claim is incorrect because crossing over creates new allele combinations on the same chromosome

The claim is correct because crossing over only occurs in mitosis

The claim is incorrect because independent assortment does not occur in meiosis

The claim is incorrect because homologous chromosomes does not show synapsis before crossing over

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 coyote are 78. What will be the number of chromosomes in its sperms.

156

39

24

12

78

Haploid gametes have ......# of chromosomes whereas Diploid cells have .....# of chromosomes

4 sets , Half 

Half (n), 4 sets (4n)

Half (n), 2 sets (2n)

2 sets (2n), Half (n)

4 sets (6n), 2 sets (3n)

Which of the following best describes Non disjunction?

Chromatin does not condense and change to chromosomes

All chromosomes are unaffected.

Chromosomes replicate too many times.

Extra chromosomes are removed.

Inability of chromosomes to separate properly.

The risk of non disjunction increase with-

Homologous chromosomes showing lesser synapsis

Increasing age of parents

Decreasing age of parents

Sister chromatids spending more time in Telophase-I

Eating healthier food

One difference between Autosomes and sex chromosomes humans is-

Autosomes is 1 pair and sex chromosomes are-22 pairs

Autosomes are-22 pairs and Sex chromosome is-1 pair

Autosomes are found in males and Sex chromosomes are in females

Autosomes are-10 pairs and rest 13 are Sex chromosome 

Autosomes and sex chromosomes are same there is no difference

How does independent assortment affect genetic variation?

Makes offspring identical to parents.

Increases variation among offspring from sexual reproduction.

Makes gametes identical to each other

Has no effect on variation.

Reduces genetic diversity in populations.

What purpose does a karyotype serve in genetics?

Study of chromosomal arrangement/numbers

Identifying the gender 

Chromosomal abnormalities

Predicting phenotype

Identification of disorders

Determining the crossing over

Determining blood type

Which statements correctly describe chromosomes during metaphase II? (Check all that apply)

Chromosomes align in the middle of the cell on the spindle fibres

Centromeres divide at this stage

Homologous chromosomes align as tetrads at the metaphase plate

Chromosomes align independently of their homologs

Each chromosome consists of two sister chromatids joined at the centromere

Sister chromatids may be genetically non-identical

If nondisjunction occurs during anaphase II of one daughter cell, which outcomes are possible in the resulting gametes? (Check all that apply)

Two normal haploid gametes

All gametes affected equally

Synapsis could be one of the results

Down's syndrome could be one of the examples

Gametes with identical chromosome numbers but different alleles

One gamete with an extra chromosome

One gamete missing a chromosome

What are the similarities between meiosis I and meiosis II?

Haploid cells are formed.

Sister chromatids separate.

Nucleolus and nuclear membrane disappear

The chromosomes line up along the equator/middle 

Crossing over happens.

Synapsis happens

Rearrange the events in Meiosis-I in the correct order

The two haploid daughter cells completely divides and is ready to go next.

The recombinant chromosomes move apart.

Synapsis occurs.

The homologous chromosomes exchange their parts.

The Homologous pairs of chromosomes line up at the equator/middle.

The nucleolus and the nuclear membrane reappears.

Categorize the following description to correct category

Contains two set of chromosomes

Contains single set of chromosomes 

Example is a Liver cell

Example is a sperm

Somatic cell

Gamete 

Haploid

Diploid

Identify the phase in the image alongside.

Metaphase-II

Anaphase-I

Telophase-I

Anaphase-II

Metaphase-I

The reason for the choice of your answer in previous question is-

Sister chromatids are separating.

Homologous chromosomes are at the equator/middle.

Sister chromatids are aligned at the equator.

Homologous chromosomes are separating.

Homologous chromosomes are crossing over.