Independent Assortment, Crossing Over, Segregation

Crossing over is important because....

• It prevents mutations from entering the gametes. 
• It allows for even distribution of chromosomes in the gametes.
• It allows for more genetic diversity of gametes.
• It allows for genetic uniformity of gametes. 

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Crossing over occurs in...

• Prophase 1
• Prophase 2
• Metaphase 1
• Metaphase 2

Tags

NGSS.HS-LS3-2

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs

• crossing over
• mutagenesis
• hybridization
• fertilization

Tags

NGSS.HS-LS3-2

During which stage does crossing over take place?

• A
• B
• C
• D

Tags

NGSS.HS-LS3-2

Linked genes are

• located on different chromosomes of the same size and shape
• located on the same chromosome
• rarely inherited together

The study of genes and inheritance...

• Ecology
• Genetics
• Evolution
• Classification

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Law of Segregation is when...

• alleles separate individually from each other
• genes for each trait separate individually from each other
• one allele masks the presence of another allele
• homologous chromosomes pair with other genes

Tags

NGSS.HS-LS3-2

One version of a gene...

• autosome
• sex chromosome
• hybrid
• allele

Tags

NGSS.HS-LS3-1

Having two different alleles for a gene...

• Homozygous
• Heterozygous
• Dominant
• Recessive

Having two copies of the same allele...

• Heterozygous
• Dominant
• Homozygous
• Recessive