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CSS - PMS - CCE - PCS - Everyday Science

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CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 32), what is the probability a gamete carries allele a?
A. 1/2
B. 1
C. 3/4
D. 1/4
Correct Answer: A
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 31), 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 30), 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 29), 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 28), what proportion is expected to show the recessive phenotype?
A. 0
B. 1/4
C. 1/2
D. 3/4
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 27), what fraction is expected to be homozygous recessive?
A. 1/2
B. 1
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 26), 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 25), what proportion is expected to show the recessive phenotype?
A. 3/4
B. 0
C. 1/4
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 24), what fraction is expected to be homozygous recessive?
A. 1/2
B. 1
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 23), 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 22), what proportion is expected to show the recessive phenotype?
A. 1/2
B. 1/4
C. 3/4
D. 0
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 21), 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 20), 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 19), 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 18), what fraction is expected to be homozygous recessive?
A. 1/4
B. 3/4
C. 1
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 17), 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 16), 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 15), what fraction is expected to be homozygous recessive?
A. 3/4
B. 1/4
C. 1/2
D. 1
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 14), what is the probability a gamete carries allele a?
A. 3/4
B. 1
C. 1/2
D. 1/4
Correct Answer: C
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 13), what proportion is expected to show the recessive phenotype?
A. 1/2
B. 1/4
C. 3/4
D. 0
Correct Answer: A
Half the offspring are expected to be aa.
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