Unit 4 Genetics

The study of genes, heredity, & genetic variation

• Heredity

• Genetics

• Traits

Humans have ? chromosomes in a normal body cell

• 48

• 23

• 46

? is the physical appearance of an organism. What we see.

• organotype

• phenotype

• genotype

? is a form of asexual reproduction in which a new organism develops from an outgrowth due to cell division at on particular site. Hydra reproduce this way.

• budding

• binary fission

• spores

A ? is a behavioral characteristic or physical attribute of an organism expressed by genes.

• offspring

• heredity

• trait

? is the genetic makeup of an organism. The letters used to describe the trait.

• phenotype

• genotype

• homozygous

Where is the genetic information located inside a eukaryotic cell?

• ribosome

• mitochondria

• nucleus

• vacuole

Genes ? occur in pairs

• never

• always

• sometimes

What would be a possible disadvantage of asexual reproduction?

• Takes less time to produce offspring

• Allows for more genetic variation

• Results in low genetic variation

Sexual reproduction ?

• decreases the chance of survival

• produces offspring that are identical to the parent

• results in genetic variation in the offspring