Heredity and Variation

Which term correctly describes an individual with a pair of the same alleles for a trait? 

• homologous
• heterozygous
• homozygous
• heterologus

 An individual with two different alleles for a specific trait is said to be _____________.

• homozygous
• heterogenous
• homogenous
• heterozygous

Tags

NGSS.HS-LS3-2

 Phenotype refers to the _________ of an individual

• genetic makeup
• physical appearance
• recessive alleles
• dominant alleles

Tags

NGSS.HS-LS3-1

 When the genotype consists of a dominant and a recessive allele, the phenotype will be like the ______________ allele.

• dominant
• recessive
• both
• neither

Tags

NGSS.HS-LS3-1

 Gregor Mendel developed some basic principles of heredity by ______________.

• breeding fruit flies
• cutting off the tails of mice
• crossing pea plants
• growing bacteria in a laboratory

Tags

NGSS.HS-LS3-2

 Which of these would best be described as a phenotype?

• blue eyes
• mutation
• Bb
• Tt

Tags

NGSS.HS-LS4-4

 A pea plant is heterozygous for height (Tt) and it is crossed with a homozygous short (tt) plant. Use a Punnett square to determine the probability of one of their offspring being short.

• 100%
• 75%%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

 One dog carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

How many females are in this pedigree?

• 3
• 4
• 6
• 7

How many of the males in this pedigree show the trait being studied?

• 2
• 3
• 4
• 6

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3