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science heredity
Question | Answer |
---|---|
what is heredity? | the passing of traits from parent to offspring |
what is reproduction? | produce other offspring that are similar to the parents |
how many parents are in asexual reproduction? | 1 parent |
how many parents in sexual reproduction? | 2 parents |
what are genes? | a section of DNA molocules that contains the information to see ones spacific protins also carries traits and is located on chromosomes |
how many chrrosomes are in an egg and sperm cell? | 23 chromosomes |
why dont you look exactily like your parents? | because the genes are carried from parents to their offspring on chromosomes and sence you have a combination of both your parents genes you would have a combination of both of them |
can identical twins be differint sexes?why? | no they cant be differint sexes because identical twins develope from teh same egg ferternal twins do not |
how many chromosomes are in the skin cells off your body? | 46 chromosomes |
girls have an XX chromosome. what do boys have? | XY |
what did gregor mendel descover? | heredity or genetics |
what is a dominant allele? | an allele is one whose trait always shows up in the organism when the allele is present |
a plant for instance that carries both a dominamt allele and recieved allelefor a certen trait is called. | a hybrid |
if oneallele is masked by the other allele in the pair the masked allele is called. | a recieved allele |
what is a trait? | a charasteristic that an organism can pass on to the offspring through the genes |
your body weigth and your skin color are two traits thats are? | inherited adn enviorment |
what is meant by purbred? | the two alleles are the same two dominant two recessive |
explain the punett square? | a chart that shows all the possible combinations of alleles that can result fom a gentic cross |
qhat is a phenotype? | an organismes physical appearence or visible traits |
what is a genotype? | an organisms genetic makeup or allele combinations |
what are chromosomes? | theory of inheritence |
what is DNA? | the gentic material that carries information about an organism and is passed fromparents to offspring |
when sex cells combine to produce offspring what will each sex cell contribute? | 23 of half of the chromosomes |
what is a major differince between sexual and asexual contribute? | sexual is with 2 parents and asexual si with 1 parent |
what is the process when a cell makes an exact copy of its self? | mitosis |
what is the process when it reduces its numbers to make a sex cell? | meosis |
in punitt square B represents brown eyes and b represents blue eyes. how many of the four will have brown eyes? | 100% or 4 out of 4 |
where are the human eggs produced? | ovaries |
where is the sperm produced? | testes |
list the levels of cell organization. | cell_ tissue_organ system_organism |
what is the joining of the sperm and egg called? | ferdalization |