CSS - PMS - CCE - PCS - Everyday Science
Cell BiologyDNA and Genetics
Cell-division practice 160: starting from one cell, how many cells result after 2 ideal mitotic doublings?
A. 3
B. 6
C. 4
D. 5
Correct Answer: C
Each round doubles cell number: 2^n.
CSS - PMS - CCE - PCS - Everyday Science
Cell BiologyDNA and Genetics
Cell-division practice 159: starting from one cell, how many cells result after 9 ideal mitotic doublings?
A. 511
B. 513
C. 514
D. 512
Correct Answer: D
Each round doubles cell number: 2^n.
CSS - PMS - CCE - PCS - Everyday Science
Cell BiologyDNA and Genetics
Cell-division practice 158: starting from one cell, how many cells result after 8 ideal mitotic doublings?
A. 256
B. 258
C. 255
D. 257
Correct Answer: A
Each round doubles cell number: 2^n.
CSS - PMS - CCE - PCS - Everyday Science
Cell BiologyDNA and Genetics
For a heterozygous individual Aa (practice 89), what is the probability a gamete carries allele a?
A. 1
B. 3/4
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 88), 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 87), what fraction is expected to be homozygous recessive?
A. 1/4
B. 1/2
C. 1
D. 3/4
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 86), what is the probability a gamete carries allele a?
A. 1/4
B. 3/4
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 85), what proportion is expected to show the recessive phenotype?
A. 1/4
B. 1/2
C. 3/4
D. 0
Correct Answer: B
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 84), what fraction is expected to be homozygous recessive?
A. 1/2
B. 1/4
C. 1
D. 3/4
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 83), what is the probability a gamete carries allele a?
A. 1/2
B. 3/4
C. 1
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 82), 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 81), what fraction is expected to be homozygous recessive?
A. 1/2
B. 1
C. 1/4
D. 3/4
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 80), what is the probability a gamete carries allele a?
A. 1/2
B. 1
C. 1/4
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 79), what proportion is expected to show the recessive phenotype?
A. 1/2
B. 3/4
C. 1/4
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 78), 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 77), what is the probability a gamete carries allele a?
A. 3/4
B. 1/2
C. 1
D. 1/4
Correct Answer: B
Alleles segregate equally.
CSS - PMS - CCE - PCS - Everyday Science
Cell BiologyDNA and Genetics
In a test cross Aa × aa (practice 76), what proportion is expected to show the recessive phenotype?
A. 1/4
B. 0
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 75), 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 74), what is the probability a gamete carries allele a?
A. 1
B. 1/4
C. 3/4
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 73), 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.