H.D - Chapter 2 Flashcards
Genotype vs Phenotype
Genotype : The sum total of all genes a person inherits
Phenotype: The features that are actually expressed
Differences of genetic disorders between males and females
Sex-Linked:
Defective gene is only found in the X-chromosome.
Males only have one X chromosome, greater risk
Passive Genotype-Environment Correlation
Children inherit the gene, and their family provides the environment
Evocative Genotype-Environment
How the social environment reacts to individuals based on their inherited genes
Active Genotype-Environment Correlation
When individuals seek out environments that support their genetic tendencies
Uterus
Fertilized egg implants to the lining of the uterus
Cervix
Placenta lies under uterus and covers most of the uterus
Fallopian tube
Egg is fertilized at top of the Fallopian tube
How long can ovum and sperm survive?
Ovum - 12-24 hours
Sperm - 6 days `
Germinal Period (1)
-Fertilization and implantation of egg
-Zygote (cell w genetic information from both parents; Mitosis)
Embryonic Period (2)
-Embryo (after implantation)
-Formation of placenta
-Period when organism is more vulnerable
-Cephalocaudal (head to tail)
-proximodistal (midline to outward)
-Formation of major organs
-Cells are differentiated
-Nervous system develops fastest
Fetal Period (3)
-Organism has all body parts except body genitalia
-Age of viability
Teratogens Factors
-Timing of exposure (critical period)
- Amount of exposure
-Number of teratogens
–Genetics
-Being Male or female (males more likely)
Stages of Birth:
First Stage
-Uterine contacting
-Cervix opens 10 cm
-Bloody discharge
Stages of Birth:
Second Stage
-Passage of baby through Canal
