Meiosis

The diploid number of chromosomes in mammals is always
1. two
2. forty-six
3. an odd number
4. an even number
A diploid cell in a buffalo has 60 chromosomes. A sperm or egg cell in a buffalo can be expected to have
1. 60 chromosomes
2. 30 chromosomes
3. 15 chromosomes
4. 120 chromosomes
"Crossing over" between maternal and paternal chromosomes takes place during
1. mitosis
2. meiosis I
3. meiosis II
4. fertilization
The process of meiosis
1. begins with diploid cells and ends with haploid cells
2. begins with diploid cells and ends with diploid cells
3. begins with haploid cells and ends with diploid cells
4. begins with haploid cells and ends with haploid cells
The first evidence of crossing-over exists in the view labeled
You can see a diploid nucleus with chromosomes that have not undergone crossing over in the field labeled
Meiosis II takes place between fields
1. A and B
2. A and C
3. B and C
4. C and D
This human karyotype shows the sex of the individual is
1. male
2. female
Chromosomes shown here that are NOT sex chromosomes are known collectively as
1. y chromosomes
2. x chromosomes
3. karyotypes
4. autosomes
This human karyotype shows the sex of the individual is
1. male
2. female
Haploid reproductive cells are collectively referred to as
1. gametes
2. zygotes
3. blastocysts
4. polar bodies
Nucleus 1 shows a diploid cell of a cartoon smurf. Which other nucleus is from a diploid smurf cell?
1. none of them
2. nucleus 2
3. nucleus 3
4. nucleus 4
Nucleus 1 shows a diploid nucleus of a cartoon smurf. Which nucleus is from a haploid smurf cell?
1. none of them
2. nucleus 2
3. nucleus 3
4. nucleus 4
The karyotype above is from a human cell. Its source is
1. a fertilized gamete
2. an egg cell
3. a sperm cell
4. a normal somatic (body) cell
Diploid cells that result from the fertilization of an egg cell by a sperm cell are called
1. gametes
2. zygotes
3. blastocysts
4. polar bodies
The karyotype above is from a human cell. Its source is
1. haploid
2. diploid
3. polyploid
4. a normal somatic (body) cell
The karyotype above shows paired, non-identical chromosomes that contain information for the same biological features and contain the same genes. These pairs are known as
1. sex chromosomes
2. homologous chromosomes
3. heterologous chromosomes
4. somatic chromosomes
If this karyotype were for a human sperm cell, it should
1. have only an "X" sex chromosome
2. have fewer autosomes
3. have only a "Y" chromosome
4. have more autosomes
5. have either an "X" or a "Y" chromosome
Nucleus 1 shows a diploid nucleus of a cartoon smurf. Which nucleus comes from an abnormal cell?
1. none of them
2. nucleus 2
3. nucleus 3
4. nucleus 4