26 terms

Terms	Definitions
Mendel studied these	pea plants
homozygous dominant	having two dominant genes for a trait, TT or BB
heterozygous	having two different genes for a trait, Bb or Tt
homozygous recessive	having two recessive genes for a trait, bb or tt
thymine	pairs with Adenine in DNA
cytosine	pairs with Guanine in DNA
uracil	RNA has this nitrogen base, DNA does not
deoxyribose	The sugar on the sides of a DNA ladder
ribose	this sugar is in RNA, not DNA
meiosis	Cell division that produces gametes
gamete	a reproductive cell; it has 1/2 the chromosomes of a body cell
karyotype	a chart of chromosomes
XX	chromosome combination for a female
XY	chromosome combination for a male
46	the number of chromosomes in a normal human
inherited	traits passed to us by our parents
genetics	the study of heredity
chromatin fiber	this is made from DNA
incomplete dominance	allelles from both parents are blended, like RW (pink flowers)
codominance	both alleles of a gene show, like a chicken with black and white feathers
gender	the sex of a person or organism
sex-linked traits	traits controlled by the sex chromosomes
carrier	an organism that has a recessive gene for a sex-linked disorder, XCX
DNA	Deoxyribonucleic acid
sperm	a male gamete
egg	a female gamete

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