DEV PSYCH 1.1

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also known as conception, is the process by which sperm and ovum (sex cells) combine to create a single cell called zygote, which then duplicates itself again and again by cell division.

fertilization

rupture of mature follicle in either ovary and expulsion of its ovum which occurs every month until menopause

ovulation

also known as Fraternal Twins Two separate eggs being fertilized by two different sperms Can be same or different sex

dizygotic twins

resulted from the cleaving of one fertilized egg and are generally genetically identical

monozygotic twins Signup and view all the answers

genetic transmission of heritable characteristics from parents to offspring

heredity Signup and view all the answers

long, spiraling ladder whose steps are made of pairs of chemical units called bases

deoxyribonucleic acid Signup and view all the answers

coils of DNA of smaller segments called genes

chromosomes Signup and view all the answers

cell division of non-sex cells

mitosis Signup and view all the answers

cell division of sex cells

meiosis Signup and view all the answers

mistake in copying genetic code which creates permanent alteration in genetic material

mutation Signup and view all the answers

not affiliated to sexual expression

autosomes Signup and view all the answers

23rd pair which indicates the baby’s sex (XX, female: XY, male)

sex chromosomes Signup and view all the answers

produce alternative expressions of characteristics

alleles Signup and view all the answers

if two alleles are the same

homozygous Signup and view all the answers

if two alleles are different

heterozygous Signup and view all the answers

allele that is always expressed or shows up as a trait in that person

dominant Signup and view all the answers

usually doesn’t show unless paired with another recessive trait

recessive Signup and view all the answers

interaction of several genes

polygenetic inheritance Signup and view all the answers

observable characteristics

phenotype Signup and view all the answers

underlying genetic makeup

genotype Signup and view all the answers

environment can influence when and which genes turn on and off Refers to chemical molecules attached to a gene that alter the way a cell “reads” the gene’s DNA

epigenesis Signup and view all the answers

carry one bad copy of recessive gene and one good one

carriers Signup and view all the answers

effects of similar environment conditions on genetically different individuals

genotype-environment interaction Signup and view all the answers

Fertilization

The process by which sperm and ovum combine to create a zygote.

Ovulation

Rupture of a mature follicle in the ovary, releasing an ovum monthly until menopause.