Chapter 7 Review - "Mendelian Genetics"

Which of the following is a genetic cross between two purebred pea plants?

• Tt x Tt
• Tt x tt
• TT x tt
• None of the answers are correct

Tags

NGSS.HS-LS3-1

Dominant alleles can be defined as

• alleles that mask or hide other alleles, such as the “tall” allele
• alleles that are masked, or covered up when there is another dominant allele.

Tags

NGSS.HS-LS3-1

An example of a homozygous recessive allele pair can be:

• Rr
• rr
• RR
• none of the answers are correct

Tags

NGSS.HS-LS3-2

An example of a heterozygous dominant allele pair can be:

• rr
• RR
• Rr
• none of the answers are correct

An example of a homozygous dominant allele par can be:

• TT
• Tt
• tt
• none of the answers are correct

Tags

NGSS.HS-LS3-2

How are genes represented within scientific context?

• scientists refer to the “factors” that control traits as genes. Genes are represented by the phenotype of the plant, e.g. Tall Plant
• scientists refer to the “factors” that control traits as genes. Genes are represented by the allele present within the organisms, e.g. Tt
• scientists refer to the “factors” that control traits as genes. Genes are identical copies of the parent offspring.
• None of the answers are correct

Tags

NGSS.HS-LS3-1

How can a tall pea plant crossed with another tall pea plant produce four offspring, within which 3 of the offspring are are tall, but one of the pea plants is short?

• One of the pea plants is homozygous recessive, while the other pea plant is homozygous recessive. This cross of pea plants would produce 3 offspring that are tall, but one of the pea plants is short.
• One of the pea plants is heterozygous dominant, while the other pea plant is homozygous dominant. This cross of pea plants would produce 3 offspring that are tall, but one of the pea plants is short.
• One of the pea plants is heterozygous dominant, while the other pea plant is heterozygous dominant. This cross of pea plants would produce 3 offspring that are tall, but one of the pea plants is short.
• none of the answers are correct.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

An organism with two different alleles for a trait is said to be: 

• recessive
• hybrid
• dominant
• purebred

Tags

NGSS.HS-LS3-1

An allele whose trait is masked in the presence of a dominant allele is

• Dominant
• Hybrid
• Purebred
• Recessive

The letter P in a "P" Generation stands for: 

• Probability
• Puppy
• Punnet
• Parent

Tags

NGSS.HS-LS3-3