Textbook Notes (368,566)
United States (206,084)
Psychology (112)
PSY 230 (27)
all (13)
Chapter 2

Child And Adolescent Development Chapter 2 Notes - 4.0ed this course

2 Pages
Unlock Document

PSY 230
All Professors

Chapter 2: Genetic Bases of Child Development (Notes are brief and not in depth-- trying to catch up to switched-in class) The Biology of Heredity: • At conception, the 23 chromosomes in the sperm merge with the 23 chromosomes in the egg. The 46 chromosomes that result include 22 pairs of autosomes plus 2 sex chromosomes • Asection of DNAthat provides specific biochemical instructions is called a gene • All of a person’s genes make up a genotype • Phenotype refers to the physical, behavioral and psychological characteristics that develop when the genotype is exposed to a specific environment Single Gene Inheritance: • Different forms of the same gene are called alleles • Aperson who inherits the same allele on a pair of chromosomes is homozygous.Aperson who inherits different alleles is heterozygous; in this case, the instructions of the dominant allele are followed. • In incomplete dominance, the person is heterozygous but the phenotype is midway between the dominant and recessive phenotypes Genetic Disorders: • Most inherited disorders are carried by recessive alleles. Inherited disorders are rarely car
More Less

Related notes for PSY 230

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.