Class III - Mendel

What is the predicted genotypic ratio from a cross of two heterozygous individuals (e.g., Tt x Tt)

• 3:1

• 1:2:1

• 9:3:3:1

• 9:4:5

The Laws of Segregation and Independent Assortment are due to the random lineup of homologous chromosomes at which stage of cell division?

• Metaphase

• Metaphase I

• Metaphase II

• Anaphase I

Tags

NGSS.HS-LS3-2

A common phenotypic ratio of a dihybrid cross is:

• 9:3:3:1

• 3:1

• 1:2:1

• 15:1

Shaded squares in pedigrees refer to what?

• Affected Males

• Unaffected Males

• Affected Females

• Unaffected Females

An allele is:

• A protein

• A unit of inheritance

• A variant of a gene

• Location on a chromosome

A carrier for a recessive disorder is:

• Heterozygous, no phenotype

• Homozygous, no phenotype

• Heterozygous, with phenotype

• Homozygous, with phenotype

Two normal, unaffected carriers of a recessive disease allele have an affected child. What is the probability their next child will also be affected?

• 25%

• 50%

• 12.5%

• 6.25

Tags

NGSS.HS-LS4-3

A strain of pea plant that always produces tall offspring is:

• beneficial

• heterozygous

• true breeding

• annoying

Tags

NGSS.HS-LS3-1

Height is a 1.___, tall is a 2.____

• 1. 1. character

  2. 2. trait

• 1. 1. trait

  2. 2. character

Tags

NGSS.HS-LS3-1

I flipped a quarter 6 times and got 6 heads. I expected 3 heads and 3 tails. Is my quarter broken?

• Yes, alert the US Mint

• No, this is just a low sample size. With more flips (say 1000), the ratio should even out to 50:50