Genetics and Heredity

describe the difference between genotype and phenotype

• Genotype is dominant and phenotype is recessive
• genotyme is the alleles and phentype is the physical appearance
• genotype is homozygous and phenotype is hybrid and genotype is purebred
• genotype is sex linked and pheontype is pheontype is not

The recessive allele will always show up when the dominant allele is present.

• false
• true

The mother  and father have brown eyes and hybrid alleles (Bb). What are the phenotypes of the children?

• 2 bb and 2 Bb
• 1Bb  2 BB and 1 bb
• 1BB  2Bb and 1bb
• 3BB abd 1 Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

B is dominant (brown) and b is recessive (blue)), What is the phenotype of an offspring with blue eyes.

• blue
• brown

Tags

NGSS.HS-LS3-1

In order for an offsring to have the phenotype of the recessive gene the parents

• Must both be purebred
• Must both be hybrid
• Must both be carriers
• ust both have at least 1 recessive gene

the mother is purebred brown eyes and the father is purebred blue eyes. What  percentage of the offspring will have blue eyes?

• 25
• 100
• 50
• 0

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In the allele that each parent will pass to the offspring is based on probability.

• true
• false

Tags

NGSS.HS-LS3-3

In codominance

• the alleles are neither recessive or dominant
• both dominant
• both recessive
• one is hybrid and the other is purebred

The human sex cell has 46 chromosomes.

• true
• false

In mitosis the number of chromosomes is reduced by half to form sex cells.

• true
• false