Meiosis Lesson

​Human Cells

​Human Cells contain 46 chromosomes (23 pairs)

​Meiosis is the production of haploid gametes

​

Multiple Choice

Compared to the number of chromosomes contained in a body cell, how many chromosomes would normally be contained in a gamete?

• The same number
• One-fourth as many
• Twice as many
• Half as many

Multiple Choice

A human zygote should have _____ chromosomes inside.

• 46
• 23
• 92
• 64

Multiple Choice

A human being has a somatic cell that has 46 chromosomes.  What is the haploid number found in a gamete?

• 23
• 46
• 69
• 92

Multiple Choice

The chromosomes that pair up during meiosis, are called __________ chromosomes.  

• homozygous 
• asexual
• homologous
• genes

Multiple Choice

Chromosomes exchange genetic material during 

• crossing over
• replication
• synthesis
• translation

Multiple Choice

CROSSING OVER TAKES PLACE DURING

• PROPHASE II

• PROPHASE I

• INTERPHASE

• METAPHASE I

Multiple Choice

CROSSING OVER INCREASES

• LIFE SPAN

• GENETIC VARIATION

• THE NUMBER OF OFF-SPRING

• ALL ARE TRUE

​Meiosis I & II

​Notice that at the end of Meiosis II there are 4 genetically different haploid cells.

​

These cells are called gametes

Multiple Choice

What phase is shown here?

• Prophase II
• Metaphase I
• Metaphase II
• Anaphase I

Multiple Choice

This image shows chromosomes during Prophase 1. Which of the following correctly describes the process shown?

• segregation of sister chromatids
• condensation and segregation of alleles
• mutationin which the DNA content of the gene is altered
• crossing - over in which alleles are exchanged

Multiple Choice

When homologous chromosomes match up, they form a structure call a ___________.

• tetrad
• triad
• diploid
• gamete

Multiple Choice

A cat has a total of 40 chromosomes in its body cells. How many in its sex cells?

• 38

• 20

• 76

• 10

Multiple Choice

Crossing over helps promote ?

• male genotype
• genetic variation
• DNA replication
• mitosis

Multiple Choice

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

• 23, 46
• 46, 23
• 2, 4
• 50, 100

Multiple Choice

What is one advantage of sexual reproduction?

• The offspring are identical to the parents
• the offspring are resistant to viruses
• the offspring are born live, instead of from eggs
• The offspring inherit a wider variety of genetic information

Multiple Choice

You get one homologous chromosome from your ________ and one from your _______.  

• dad, mom
• brother, sister
• grandmother, grandfather
• dog, cat

Multiple Choice

Which statement best describes the importance of sexual reproduction?

• sexual reproduction produces variation in offspring
• sexual reprosuction provides regeneration of body parts
• sexual reproduction occurs between individuals of the same species
• sexual reproduction produces offspring that are identical

Multiple Choice

Which of the following statements correctly describes meiosis?

• Meiosis does not occur in reproductive cells.
• The cells produced at the end are identical 
• the cells produced at the end contain half the # of chromosomes
• cells divide only once during meiosis