Reproduction - Section 6.1 Quiz

A peacock chick receives one set of chromosomes from its mother and one set of chromosomes from its father. Each set of these inherited chromosomes is referred to as the
1. haploid number.
2. embryo.
3. zygote.
4. diploid number.
The following diagram represents sexual reproduction in peacocks.

What process is represented by the "X" in the diagram?
1. Meiosis
2. Mitosis
3. Development
4. Fertilization
The following diagram represents sexual reproduction in peacocks.

What labels in the diagram represent all the organisms and structures with a diploid chromosome number?
1. I, IVand V
2. I, II, IVand V
3. II and III
4. V and IV
The following diagram represents sexual reproduction in peacocks.

Which structure in the diagram represents a zygote?
1. Structure III
2. Structure IV
3. Structure II
4. Structure I
In gamete formation, DNA replication occurs
1. before meiosis begins.
2. between meiosis I and meiosis II.
3. during meiosis II.
4. after meiosis is complete.
What processes contribute to genetic variation in offspring?
1. Chromosome mutation, crossing over and independent assortment
2. Crossing over and independent assortment, but not chromosome mutation
3. Crossing over and chromosome mutation, but not independent assortment
4. Independent assortment and chromosome mutation, but not crossing over
Is the process of meiosis active in 9-year-old (prepubescent) humans?
1. No
2. In prepubescent boys only
3. In prepubescent girls only
4. Yes, in both prepubescent boys and girls
Which of the following sentences best describes the relationship between radiation and mutation?
1. Radiation can cause gene or chromosome mutations
2. Radiation can cause gene mutations only
3. Radiation can cause chromosome mutations only
4. Radiation cannot cause mutations
Chromosome mutations
1. can be passed on to offspring.
2. can never be passed on to offspring.
3. are never fatal.
4. can occur only during meiosis II.
Down's Syndrome, also called Trisomy 21, is caused by
1. a whole chromosome mutation.
2. a chromatid mutation.
3. a gene mutation.
4. a partial chromosome mutation.