Genetics

On a Punnett square, the letters in the different positions represents the _______________ of each parent.

• DNA

• chromosome

• Allele

• Trait

Examine the Punnett square below.

Which of the following choices gives the alleles of the parents shown here?

• BB and BB

• BB and Bb

• Bb and Bb

• Bb and bb

Tags

NGSS.HS-LS3-1

Carrie is studying the genes of two fruit flies in her lab. She knows what alleles they have. She wants to know the potential combinations of alleles their offspring could inherit. Which of these choices would help Carrie identify the potential combinations?

• an allele

• a carrier

• a pedigree

• a Punnett square

Look at the diagram below.

Which of these choices best describes what the shaded box represents?

• one possible combination of alleles in all offspring

• the only possible combination of alleles in an offspring

• the only possible combination of alleles in the female parent

• one possible combination of alleles in the male, but not the female parent

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Look at the diagram shown below.

Which of these choices gives the correct ratio for the offspring predicted by the diagram?

• 2 BB : 1 Bb

• 1 BB : 1 BB

• 1 BB : 1 Bb

• 1 BB : 2 Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Look at the diagram below.

Which of these choices should be placed in the box with the question mark?

• AA

• Aa

• aa

• Ab

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Anya and Greg are working in their research laboratory. Anya tells Greg that one of the mice has a 50% probability of having the alleles DD and a 50% probability of having the alleles Dd. What does Anya mean by this?

• There are two chances in 50 that the mouse has the alleles DD or Dd.

• The chance the mouse has the alleles DD is equal to the chance that it has Dd.

• The mouse is twice as likely to have the alleles DD than to have the alleles Dd.

• There are two more possible outcomes besides the mouse having DD or Dd alleles.

Tags

NGSS.HS-LS3-3

Look at the diagram below.

Which of these statements is correct according to the diagram?

• Each offspring has a 25% probability of inheriting the alleles PP

• Each offspring has a 25% probability of inheriting the alleles Pp

• Each offspring has an equal probability of inheriting the alleles PP or Pp

• Each offspring is more likely to inherit pp than any other combination of alleles

Tags

NGSS.HS-LS3-3

Look at the diagram below.

What is the correct ratio of offspring predicted by the diagram?

• PP to pp is predicted to be 2:1

• Pp to pp is predicted to be 2:1

• PP to Pp is predicted to be 1:1

• Pp to PP is predicted to be 1:2

Tags

NGSS.HS-LS3-3

Look at the diagram shown below.

Which of these choices is true about individual 4 in generation II?

• male and the father of individual 3 in generation III

• male and the son of individuals 1 and 2 in generation I

• female and the mother of individual 3 in generation III

• female and the daughter of individuals 1 and 2 in generation I

Tags

NGSS.HS-LS3-1