Chapter 11 Deck 5 (Slides 30-38) Flashcards
In the early 1900’s, American geneticist Thomas H. _____ wanted to see if Mendel’s principles applied to other organisms besides pea plants
Morgan
Thomas H. Morgan picked the ___ ____ to study
Fruit Fly (“Drosophila melanogaster”)
What did Thomas H. Morgan find?
all Mendel’s principles also applied to Drosophila
characteristics of an organism are NOT just determined by genes; they are determined by interaction between genes and the ____
environment
genes provide a plan for development, but how that plan unfolds also depends on the ____
environment
An example of the interaction between genes and environment is the characteristic of human ___
example: a person may have the genetics to be very tall but may not reach their potential height because of poor diet (environment)
height
the same genes cause snowshoe rabbit’s fur to be ____in summer and _____in winter
brown
white
GENES are located on CHROMOSOMES in the CELL ____
nucleus
The reason why GENES are FOUND IN PAIRS is that the
CHROMOSOMES that they are found on ARE IN ____
pairs
GENE PAIRS SEGREGATE from each other during gamete formation because the CHROMOSOME PAIRS that they are on SEGREGATE from each other during GAMETE FORMATION
This process is called _____
MEIOSIS
In chromosome pairs called _____
CHROMOSOMES the genes on each correspond to each other
HOMOLOGOUS
Each chromosome actually contains ___’s of genes
1,000’s
The 2 chromosomes of a homologous pair are the same ___and ____
size and shape
A cell that contains BOTH SETS OF HOMOLOGOUS CHROMOSOMES (1 set from Mom, 1 set from Dad) is said to be _____, or 2N (means “2 sets”)
Diploid
All body cells (SOMATIC CELLS) are ____
Diploid
