Meiosis and Genetics

What is the top left arrow pointing to?

• Homozygous dominant

• Heterozygous

• Homozygous recessive

• heterozygous dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

According to the Punnett square in basic mendelian genetics: B reprepsents the dominant gene for blue feathers and b represents the recessive gene for red feathers. Two heterozygous birds have one offspring. What percent chance does it have for red feathers?

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Organisms that have two identical alleles for a particular trait are said to be

• hybrid.

• homozygous.

• heterozygous.

• dominant.

Unlike mitosis, meiosis results in the formation of

• two genetically identical cells.

• four genetically identical cells.

• four genetically different cells.

• four genetically identical cells.

Tags

NGSS.HS-LS3-2

In alleles, capital letters show:

• Recessive traits.

• Dominant traits.

Heterozygous means:

• Same alleles. Ex: TT

• Different alleles. Ex: Tt

What is true about genotypes?

• Genotypes are the physical traits

• Genotypes are the allele combinations.

Phenotypes refer to:

• Allele combinations.

• Physical Characteristics.

Study the Punnett Square. What is the probability of a dominant trait showing up?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

What is the final result in meiosis?

• Two new daughter cells with the exact same chromosomes.

• Four new cells, each with half the chromosomes.

• Four new cells, each with twice the chromosomes.