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Stack #206213

Chapter 5 - 7th grade Science

QuestionAnswer
heredity passing of traits from parent to offspring
Gregor Mendel father of genetics
self-pollinating plant contains both male and female reproductive structures
true-breeding plant a plant that self-pollinates
dominant trait trait that is always present
recessive trait trait that is hidden
genes segments of DNA that carry hereditary insturctions and are passed from parent to offspring
alleles different forms of a single gene
genotype inherited combination of alleles
phenotype an organism's appearance
probability mathematical change that an event will occur
sex cells parent cells
sexual reporduction two parent cells join together to form a new individual
homologous chromosomes chromosomes in each pair
How many human body cells 46
how many sex cells 23
meiosis produces new cells with half the usual number of chromosomes
sex chromosomes carry the genes that determine male or female
traits inherited forms of characteristics
What did MEndel use to study heredity? pea plants
If both the dominant allele and the recessive allele are inherited for a characteric, which allele is expressed? dominant
When are recessive traits apparent? Only when two recessive alleles for the characterstic are inherited
Where are genes located? in the chromosomes
What kind of chromosomes do females have? two X chromosomes
What kind of chromosomes do mailes have? one X and one Y chromosome
What produeces cells with half of the normal number of chromosomes Meiosis
this kind of plant can pollinate its own eggs self-pollinating plant
Sperm and eggs are known as sex cells
Created by: refroelich
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