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Genetics

QuestionAnswer
Heredity The passing of genes from one generation to another
Genes A unit of heredity that codes for a particular trait that is located on our chromosomes
Alleles Different forms of the same gene (Brown Hair, Blonde Hair, Black Hair, Red Hair)
Inherited Traits A trait that is passed on from parents to child through the genes
Acquired Traits A trait that is learned through the environment (walking, reading, riding a bike)
Dominant This allele can be expressed when only one copy is present. It will cover up another factor because it's stronger- capital letter
Recessive This allele is expressed only if two copies are present. It seems to disappear in the person- lowercase letter
Homozygous Two of the same alleles (DD or dd)
Purebred Another word for homozygous
Heterozygous Two different alleles (Dd)
Hybrid Another name for heterozygous
Homozygous recessive Two recessive alleles (dd)
Homozygous dominant Two dominant alleles (DD)
Phenotype Physical appearance of a gene (hair color, eye color)
Genotype The genes of an organism located on the "inside" of the person (ex: Dd)
A cat has an allele for red fur but its fur is black. The allele for red fur is recessive
What is the genotype that makes a female? XX
What is the genotype that makes a male? XY
A rabbit with black fur (BB) is crossed with a white fur (bb). What are the chances of having a rabbit baby with white fur? 0%
How many total chromosomes are in each human sperm or egg cell? 23
What is the dominant color for a cross between a heterozygous purple flower and a white flower? Heterozygous would be Tt. The "T" is dominant trait. Question indicated it was a heterozygous purple flower - so purple is dominant and white is recessive.
Created by: connie.hambey
 

 



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