Biology Ch 12

Meiosis produces cells with how many chromosomes?

• 23
• 44
• 22
• 46

Which event takes place during anaphase II of meiosis II?

• nuclear membrane breaks down
• spindle fibers disassemble
• cytoplasm divides
• sister chromatids separate

A plant that is homozygous for red flowers is crossed with a plant that is homozygous for white flowers. In the case of incomplete dominance, the flowers of the offspring will be

• red and white.
• white only.
• pink only.
• red only.

Tags

NGSS.HS-LS3-1

In the case of codominant alleles, a plant that is homozygous for red flowers that is crossed with a plant that is homozygous for white flowers will produce flowers that are

• red and white spotted.
• completely white.
• dark pink all over.
• pink and red.

Eye color, hair color, and skin color are polygenic traits. Polygenic traits result from

• recessive genes.
• many genes.
• codominant genes.
• epistatic genes.

In Mendel's monohybrid cross of a purebred white-flowered plant and a purebred purple-flowered plant, the F generation...

• showed only the dominant trait
• showed only the recessive trait
• did not receive any recessive alleles
• remained purebred

Which of the following phrases best describes the function of meiosis?

• reduces chromosome number by half, produces gametes
• reduces chromosome number by half, produces diploid cells
• conserves chromosome number, produces haploid cells
• conserves chromosome number, produces genetically identical cells

In a genotype for plant height, such as Tt, what does each letter represent?

• one genome
• one gene
• one allele
• one gamete

If females are XX, Males are _____

• YY
• XX
• XY

In humans, gamete cells contain __________ number of chromosomes.

• N=23
• diploid
• haploid
• gene
• allele