Meiosis and Mendelian Genetics

Gametes are produced by the process of

• meiosis
• replication
• crossing over
• mitosis

Which is the best description of the events that take place in anaphase II?

• Homologous chromosome line up along the equator.
• Sister chromatids are separated and pulled to opposite sides of the cell.
• Homologous pairs are separated and pulled to opposite sides of the cell.
• The replicated chromosomes become visible.

In chickens, rose comb (R) is dominant to single comb(r).  Homozygous rose-combed roosters were mated with single-combed hens. All the chicks in the F1 generation are kept together as a group for several years. They were all allowed to mate only within their own group. What is the expected phenotype of the F2 chicks?

• 75% rose comb and 25% single comb
• 50% rose comb and 50% single comb
• 100% rose comb
• 100% single comb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Chromosomes form tetrads during 

• prophase I
• anaphase II
• metaphase I
• interphase of meiosis

When Gregor Mendel crossed a tall pea plant with a short pea plant, the F1 generation inherited

• An allele for tallness from the the short parent and an allele for shortness from the short parent.
• An allele for tallness from both parents.
• An allele for shortness from both parents.
• An allele from only the tall parent.

Tags

NGSS.HS-LS3-1

The typical human body cell contains 46 chromosomes. How many chromosomes are found in the average human sperm?

• 46
• 45
• 92
• 23

A heterozygous organism is best described as 

• genotype
• hybrid
• dominant
• True-breeding

The chemical factors that determine traits are called  

• chatarters
• alleles
• traits
• genes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS1-1

Offspring that result from crosses between parents with different traits

• make up the F2 generation
• are called hybrids
• make up the parental generation
• are true breeding

Use Figure 10-1 on the board
The process shown occurring at A and B are

• mitosis and pollination
• meiosis and pollination
• Meiosis and fertilization
• mitosis and fertilization