bilogy quiz 3 sexual reproduction

triploid (3n)

3 sets of chromosomes ( banana)

cystic fibrosis

A genetic disorder that is present at birth and affects both the respiratory and digestive systems.. thicc build up of mucus

hemophilia

A hereditary disease where blood does not coagulate to stop bleeding most commonly occurs in boys 3 types A B C a is the most common

Tay-Sachs disease

A human genetic disease caused by a recessive allele that leads to the accumulation of certain lipids in the brain. Seizures, blindness, and degeneration of motor and mental performance usually become manifest a few months after birth. common amung jewish average age is 40

albinism

Absence of pigment in the skin, hair, and eyes. can happen in any organism both parents must carry this gene

female

XX

male

XY

sickle cell anemia

a genetic disorder that causes abnormal hemoglobin, resulting in some red blood cells assuming an abnormal sickle shape. recessive trait most commin in african americans

huntigntons disease

a genetic disorder that is classified as a neurodegenerative disorder fatal any child with an HD parent has a 50 percent chance chromsome 4

autosomes

all other chromosomes

Drosophila melanogaster

common fruit fly has 4 pairs of chromsomes used for 3 reasons small 2mm east to handle produce many offspring in 2 weeks

what animals does polypoid happens in

eaethworms and goldfish and 1 in every 3 species of plants

Klinefelter's

occurs in only males have a y and 2x chromsomes 1 in 500 to 1000 live births lack facial hair and other secondary sex male characteristics

turners syndrome

occurs only in females only have one x chromosome 23rd pair 60000 girls and females in the usa 1 ing 2000 live births have no sexual characteristics such as breasts tissue, most do not produce eggs

Thomas Hunt Morgan

pioneered the use of fruit flies to study genetics discovered that male and female chromosomes are slightly different (x and y) called sex chromsomes pair 2

Codominance

results in both alleles being expressed equally

what hapoens when thus happens in plants

results in large fruits and more resistance to harah weather

chromsome theory of heredity

states that heredity factors are carried on chromosomes discovered by walter sutton, a columbia university student he studies grass hoppers concluded each chromsome carries 100s of genes

multiple alleles

when 3 or more alleles control a trait in a population

incomeplete dominance

when neither allele is dominant an intermediate trait results

polyploidy

when there are 1 or more extra sets of chromsomes in an organsism

down syndrome

whwn there are 3 copies of chromosomes on number 21 1 out of 800 live births eyes slanting, mental retardation, wide nose, heart defects