Question

Lab 6: Mitosis, Meiosis and Corn Genetics Genetics Be able to recognize homozygous dominant/recessive, heterozygous genotypes Be able to complete a monohybrid cross punnett square

LAB 9: Human Physiology Cardiovascular System Anatomy of the heart (PPT slide 4) Write out the pathway for oxygenated blood in the heart (PPT slide 5) Write out the pathway of deoxygenated blood in the heart (PPT slide 5) Define Systolic vs. Diastolic BP What are some factors that affect blood pressure? Visual System Anatomy of the eye (PPT slide 4) What is accommodation? What three steps occur in the process of accommodation? Auditory System Anatomy of the ear (PPT Slide 25)

Answer 1

There are two types of cell division: mitosis and meiosis. Meiosis is the type of cell division that creates egg and sperm cells. Mitosis is a fundamental process for life. During mitosis, a cell duplicates all of its contents, including its chromosomes divides to form two identical daughter cells.

In homozygous dominant genotypes, both genes (in diploid organisms) for a trait are the same and are dominant. This individual would exhibit the dominant phenotype.

In heterozygous phenotypes, the diploid organism has one dominant and one recessive gene. This individual would exhibit the dominant phenotype.

In homozygous recessive phenotypes, both genes (in diploid organisms) are recessive. This individual would exhibit the recessive phenotype.

Dominant is a gene that is always phenotypically expressed —it is observable— if it is present. Dominant genes are written with an upper case letter.

Recessive is a gene that is only phenotypically expressed when the dominant gene is not present. Recessive genes are written with a lower case letter.

Punnett square-

Purple ear x yellow ear

RR x rr

	R	R
r	Rr	Rr
r	Rr	Rr

all purple (heterozygous)