Which of Mendel's laws BEST explains why an organism with the genotype ‘Tt’ will show only the dominant phenotype?

• Law of Dominance
• Law of Segregation
• Law of Independent Assortment
• Law of Filial Generations

Two parents have the genotype Gg for a genetic disorder caused by a recessive allele. What is the chance that any of their children will inherit the disorder?

• 25%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In guinea pigs, short hair is dominant to long hair. If two heterozygous guinea pigs are crossed, the resulting genotypic ratios are 25% HH, 50% Hh, and 25% hh. How many guinea pigs, if 16 are born, will have long hair?

• 12
• 4
• 6
• 3

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Situations in which one allele for a gene is not completely dominant over another allele for that gene and the result is a blend of the two parent traits is called...

• incomplete dominance.
• multiple alleles.
• polygenic inheritance.
• multiple genes.

Human height occurs in a continuous range because it is affected by the interaction of many genes, making it a(n)...

• autosomal trait
• sex-linked trait
• polygenic trait
• codominant trait

Human males typically have...

• one X and one Y chromosome.
• two X chromosomes.
• one X chromosome only.
• two Y chromosomes.

If a man with blood type A and a woman with blood type B produce an offspring, what are all of the possibilities for the offspring’s blood type?

• A, B, AB, or O
• A, B, or O
• AB or O
• AB only

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be...

• speckled
• gray
• white
• black

Which pair of genes in the diagram below would be most likely to be inherited together?

• A and B
• A and C
• C and D
• D and E

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following pairs of genotypes result in the same phenotype? This is for blood typing.

• a
• b
• c
• d

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2