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CSS - PMS - CCE - PCS - Everyday Science

CSS - PMS - CCE - PCS - Everyday Science MCQs With Answers

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CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a monohybrid cross Aa × Aa (practice 72), what fraction is expected to be homozygous recessive?
A. 3/4
B. 1
C. 1/2
D. 1/4
Correct Answer: D
Aa × Aa gives 1 AA : 2 Aa : 1 aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 71), what is the probability a gamete carries allele a?
A. 1/2
B. 1/4
C. 1
D. 3/4
Correct Answer: A
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 70), what proportion is expected to show the recessive phenotype?
A. 3/4
B. 1/4
C. 1/2
D. 0
Correct Answer: C
Half the offspring are expected to be aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a monohybrid cross Aa × Aa (practice 69), what fraction is expected to be homozygous recessive?
A. 3/4
B. 1/2
C. 1/4
D. 1
Correct Answer: C
Aa × Aa gives 1 AA : 2 Aa : 1 aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 68), what is the probability a gamete carries allele a?
A. 1/2
B. 3/4
C. 1/4
D. 1
Correct Answer: A
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 67), what proportion is expected to show the recessive phenotype?
A. 3/4
B. 1/4
C. 0
D. 1/2
Correct Answer: D
Half the offspring are expected to be aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a monohybrid cross Aa × Aa (practice 66), what fraction is expected to be homozygous recessive?
A. 1
B. 1/2
C. 3/4
D. 1/4
Correct Answer: D
Aa × Aa gives 1 AA : 2 Aa : 1 aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 65), what is the probability a gamete carries allele a?
A. 1/2
B. 1/4
C. 3/4
D. 1
Correct Answer: A
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 64), what proportion is expected to show the recessive phenotype?
A. 0
B. 1/4
C. 3/4
D. 1/2
Correct Answer: D
Half the offspring are expected to be aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a monohybrid cross Aa × Aa (practice 63), what fraction is expected to be homozygous recessive?
A. 1/4
B. 1
C. 3/4
D. 1/2
Correct Answer: A
Aa × Aa gives 1 AA : 2 Aa : 1 aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 62), what is the probability a gamete carries allele a?
A. 1/4
B. 1/2
C. 1
D. 3/4
Correct Answer: B
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 61), what proportion is expected to show the recessive phenotype?
A. 3/4
B. 1/4
C. 0
D. 1/2
Correct Answer: D
Half the offspring are expected to be aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a monohybrid cross Aa × Aa (practice 60), what fraction is expected to be homozygous recessive?
A. 1
B. 1/4
C. 3/4
D. 1/2
Correct Answer: B
Aa × Aa gives 1 AA : 2 Aa : 1 aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 59), what is the probability a gamete carries allele a?
A. 3/4
B. 1/4
C. 1
D. 1/2
Correct Answer: D
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 58), what proportion is expected to show the recessive phenotype?
A. 1/2
B. 0
C. 1/4
D. 3/4
Correct Answer: A
Half the offspring are expected to be aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a monohybrid cross Aa × Aa (practice 57), what fraction is expected to be homozygous recessive?
A. 1
B. 3/4
C. 1/2
D. 1/4
Correct Answer: D
Aa × Aa gives 1 AA : 2 Aa : 1 aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 56), what is the probability a gamete carries allele a?
A. 1/4
B. 3/4
C. 1/2
D. 1
Correct Answer: C
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 55), what proportion is expected to show the recessive phenotype?
A. 3/4
B. 0
C. 1/2
D. 1/4
Correct Answer: C
Half the offspring are expected to be aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a monohybrid cross Aa × Aa (practice 54), what fraction is expected to be homozygous recessive?
A. 1/2
B. 3/4
C. 1/4
D. 1
Correct Answer: C
Aa × Aa gives 1 AA : 2 Aa : 1 aa.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 53), what is the probability a gamete carries allele a?
A. 1
B. 1/4
C. 1/2
D. 3/4
Correct Answer: C
Alleles segregate equally.
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