Whale evolution

CROSSING OVER INCREASES

• LIFE SPAN

• GENETIC VARIATION

• THE NUMBER OF OFF-SPRING

• ALL ARE TRUE

MEIOSIS

• REDUCES THE NUMBER OF CHROMOSOMES BY ONE HALF

• PRODUCES UNIQUE SEX CELLS-1N

• ALLOWS TRAITS TO BE PASSED TO OFFSPRING

• ALL ARE TRUE

• INCREASE GENETIC VARIATION

NORMAL HUMANS HAVE 46 CHROMOSOMES, HOW MANY WILL THE SEX CELLS (EGG AN SPERM) HAVE AFTER MEIOSIS?

• 46

• 23

• 12

• 92

MEIOSIS PRODUCES 4 CELLS-THE CHROMOSOME NUMBER IS ...

• DIPLOID

• HAPLOID

Which letter(s) in the diagram correspond to cells that are haploid? 

• A
• B
• C
• A and B

Crossing over helps promote 

• male genotype
• genetic variation
• DNA replication
• mitosis

Females have ____ and males have _____ chromosomes.

• XX, XY
• XY, XX
• XX, XX
• XY, XY

This law describes how each homologous pair separates independently of any other pairs during Anaphase I of meiosis

• Law of Segregation

• Law of Independent Assortment

• Law of Gravity

• Law of Mathematical Order

The exchange of pieces of chromatin between homologous chromosomes during Prophase I of meiosis is called

• independent assortment

• mutation

• crossing over

• random fertilization

Any change in the sequence of DNA is a

• recombination

• mutation

• chromatin

• independent assortment