Biology STAAR Category 2- Genetics

DNA is considered a universal genetic code. Which statements are true of the genetic code? Pick THREE correct sentences.

• The order of nucleotide sequences of the genetic code is the same for all living organisms.

• The components that make up the genetic code are common among all living organisms.

• Proteins are assembled from a four letter codon that specifies what amino acids are needed.

• The genetic code uses the four nucleotide bases: adenine, guanine, cytosine, and thymine.

• Amino acid sequences on the genetic code can be determined by the arrangement of the codons.

Tags

NGSS.HS-LS1-1

Delray has dimples and his wife does not. Delray has a homozygous dominant genotype for dimples, and his wife has a homozygous recessive genotype for no dimples.

If Delray and his wife decide to have children, then which Punnett square correctly shows the probability of them having a child with dimples?

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Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

Sickle-cell anemia is caused by the homozygous recessive genotype. People with sickle-cell anemia have the genotype aa. People without sickle-cell anemia have either the genotype AA or Aa. A woman with the genotype AA has a child with a man with the genotype aa. What is the probability, as a percentage, that their child will have sickle cell anemia? (a)  

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS3-3

A sequence of DNA undergoes the following change:

TAC ACA CAA ACG GGG → TAC ACA GGA ACG GGG

This mutation will cause the amino acid​ (a)   to be replaced by .​ ​ (b)  

• Valine
• Proline
• Cysteine
• Threonine
• Glutamine
• Glycine

Tags

NGSS.HS-LS3-2

NGSS.HS-LS1-1

Which statement best explains the color and texture change of the leaves?

• Plants shrink when they do not get sunlight

• Plants can grow without sunlight.

• Environmental conditions do not alter a plant's characteristics.

• Environmental conditions influence the expression of genetic traits

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1