Genetics & Meiosis

Matching.

• heterozygous

• AA

• homozygous dominant

• Aa

• homozygous recessive

• aa

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Matching.

• The allele combination (AA, Aa, aa)

• genotype

• The physical traits

• phenotype

• 1 set of chromosomes

• haploid

• 2 sets of chromosomes

• diploid

Labeling.

a

b

sister chromatids

homologous chromosomes

Tags

NGSS.HS-LS3-1

Sort each item into its correct category.

Groups:

(a) Mitosis

,

(b) Meiosis

• Result: 4 cells with non-identical DNA

• 2 rounds of PMAT

• Asexual reproduction

• Genetic variation

• Result: 2 cells with identical DNA

• body cells (skin, muscle, etc)

• 1 round of PMAT

• sex cells (sperm or egg)

• Growth & repair

• Sexual reproduction

Tags

NGSS.HS-LS1-4

NGSS.HS-LS3-2

During meiosis, which event involves homologous chromosomes exchanging sections of DNA during Prophase I?

• Crossing over

• Replication

• Fertilization

• Tradesies

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a species of rabbit, brown fur is dominant to white fur. Perform a cross between 2 heterozygous rabbits.

b

c

a

FF

Ff

ff

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This Punnett square shows a heterozygous cross. Brown fur (F) is dominant over white fur (f).

What is the phenotypic ratio?

• 3:1

• 1:2:1

• 1:1

• 4:0

Snapdragon flowers display incomplete dominance.

Red color (R) is incompletely dominant to white color (r).

If 2 pink flowers are crossed, what is the phenotypic ratio?

(Hint: make a punnett square!)

• 1 red : 2 pink : 1 white

• 3 red : 1 white

• 3 white : 1 red

• 1 pink : 2 red : 1 white

In cows, there are two alleles for color: white and red.

The spotted cow shown in the picture is heterozygous.

What is this type of inheritance called?

• codominance

• incomplete dominance

• complete dominance

Matching.

• sex cells (sperm or egg)

• gamete

• a form/version of a gene

• autosome

• a section of DNA that codes for a trait

• gene

• a non-sex chromosome

• allele