Genetic Crosses

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  • Created by: Nicole D
  • Created on: 07-12-13 19:25
Genetic Crosses
10 Questions
1 of 12
What is the genetic cross?
A conventional pattern for describing the results of breeding experiments
2 of 12
Consider a cross between a homozygous tall pea plant with a homozygous dwarf pea plant
So if we used the letter 'h' ...
3 of 12
What would 'H' represent?
The dominant allele for a tall plant
4 of 12
Therefore what would 'h' represent?
The recessive allele for a dwarf plant
5 of 12
What are the parents' phenotypes?
Tall and dwarf
6 of 12
What are the parents' genotypes?
HH and hh
7 of 12
What are the different types of gametes they can make?
H, H, h, and h
8 of 12
Draw out the genetic diagram for the possible offspring
.
9 of 12
Therefore, what is the expected offspring?
100% tall pea plant (heterozygous)
10 of 12
Now consider a cross between 2 heterozygous pea plants, what would the offspring be?
75% tall, 25% dwarf / 25% homozygous dominant, 50% heterozygous, 25% homozygous recessive
11 of 12
What ratio of the dominant allele to the recessive allele in this second generation?
3 : 1 ---> dominant : recessive
12 of 12

Other cards in this set

Card 2

Front

What is the genetic cross?

Back

A conventional pattern for describing the results of breeding experiments

Card 3

Front

Consider a cross between a homozygous tall pea plant with a homozygous dwarf pea plant

Back

Preview of the front of card 3

Card 4

Front

What would 'H' represent?

Back

Preview of the front of card 4

Card 5

Front

Therefore what would 'h' represent?

Back

Preview of the front of card 5
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