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Genetics Unit

Genetics Unit (7th Grade)

QuestionAnswer
Genetics study of heredity
"Father of Genetics" Gregor Mendel
self-pollinating they don't need another flower to reproduce
Cross-pollination taking pollen from flower and fertilizing a different flower with the pollen
true-breeding offspring only displays one form of a trait ex: all flowers are white and only make other white flowers when bred
P generation parent generation
F1 generation first filial generation
F2 generation *second filial generation
Dominant traits trait that remains seen (expressed) in F1 generation
Recessive traits trait that is not seen (not expressed) in F1 generation
homozygous Same information on the genes (ex: GG)
heterozygous Different info (ex: Rr)
allele Each copy of a gene
Genotype the set of alleles that an individual has (letters)
Phenotype how a trait looks when expressed (is the Physical appearance/how it looks)
homozygous dominant has 2 dominant alleles EX: TT
homozygous recessive has 2 recessive alleles EX: tt
heterozygous has 2 different alleles EX: Tt
Probability the chance or likelihood that a certain event will occur
pedigree Tracking traits in families by making a chart or family tree
sex-linked trait trait that is carried on only one of the sex chromosomes only (ex: hemophilia/color blindness
cross Represents the combining of male and female sex cells in Punnett squares. (When parents produce offspring.)
heredity The passing of traits from one generation to the next by means of genes.
hybrid An organism with one dominant and one recessive gene for the same trait.
inheritance Passing of traits from parents to offspring..
Punnett square A genetic tool to solve genetics problems mathematically.
trait A distinguishing characteristic based on your genes (such as eye color or hair color).
cross Represents the combining of male and female sex cells in punnett squares.
hybrid A genotype with 1 dominant and 1 recessive gene (like Tt or Bb)
pure A genotype with 2 dominant or 2 recessive genes (like BB or bb or HH or hh
The process where reproductive (sex) cells are formed: Meiosis
Process where body cells are produced Mitosis
An abnormal condition that a person inherits through genes or chromosomes Genetic Disorder
A person who has one recessive allele for a trait but does not have the trait Carrier
Two parent's child or creation Offspring
A segment of DNA that controls a trait Gene
Created by: Mrs. Corey