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Flashcards in Chapter 14 Deck (27):
1

Gregor Mendels study began in

1857

2

Mendel bred ___ to study ___

Pea plants
Genetics

3

Three reasons Mendel chose pea plants

Available in many varieties
Short generation time
Large # of offspring generate

4

Each variant for a character is called a

Trait

5

What does it mean for an individual to be "true-breeding"

Would only generate offspring which are the same as its parents

6

Mendels P generation

Purple and white flowers
True breeding parents

7

F1 generation

All purple flowers
Hybrids

8

F2 generation

Lots of purple flowers
Some white

9

Alternative versions of genes which account for variation in inherited characters

Alleles

10

____ allele over ___ allele

Dominant recessive

11

"Blending" hypothesis or "particulate" hypothesis and why?

Particulate bc we know traits can skip a generation

12

Based on the law of segregation how many alleles does a single organism pass on to each of its offspring?

1

13

If a pea plant has one allele for purple flowers and one allele for white flowers what is the chance of one particular offspring receiving the white flower allele?

50%

14

Draw a punnet square

See chapter notes

15

An organism that has a pair of identical alleles for a character

Homozygous

16

An organism that has 2 different alleles for a genes character

Heterozygous

17

Actual genes of organisms

Genotype

18

What it looks like

Phenotype

19

When would you perform a test cross?

When an organism has an unknown genotype.
Dominant phenotype and unknown genotype

20

How does a test cross work?

Cross unknown w homozygous recessive individual

21

What is the ratio of phenotype a in the F2 generation in a monohybrid cross

3:1

22

What is the ratio of phenotypes in the F2 generation in a dihybrid cross?

9:3:3:1

23

By the law of independent assortment a plant the inherits an allele for round peas from one parent ____ inherits an allele for yellow peas from that parent

Sometimes

24

The law of independent assortment applies to genes on ____ chromosomes

Different

25

To determine a plants chances of having purple flowers and yellow peas (the probability that these two independent events will occur together) you would

Multiply

26

To determine a plants chances of having round green peas or round yellow peas (the probability of either of these two mutually exclusive events occurring) you would

Add

27

Solve a genetics problem

See chapter notes