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Biology - 9.2 Genetic Crosses Test

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Biology - 9.2 Genetic Crosses TestOnline version

BIOOOOOOOOOO

by John Lawrence
1

What's complete dominance?

2

What's incomplete dominance?

3

What's codominance?

4

The appearance of an organism is its...

5

A genetic cross performed many times produces 798 long-stemmed plants and 266 short-stemmed plants. The probability of obtaining a short-stemmed plant in a similar cross is...

6

A monohybrid cross of two individuals that are heterozygous for a trait exhibiting complete dominance would probably result in a phenotypic ratio of...

7

To determine the genotype of an individual that shows the dominant phenotype, you would cross that individual with one that is...

8

In a dihybrid cross between an individual with the genotype RRYY and an individual with the genotype rryy, all if the offspring will have the genotype...

9

What's the difference between a homozygous individual and a heterozygous individual?

10

If the probability that a specific trait will appear in the F₂ generation is 0.25, how many individuals would be expected to show that trait in an F₂ generation consisting of 80 individuals?

11

A homozygous dominant individual (AA) is crossed with an individual that is heterozygous for the same trait (Aa). What are the possible genotypes of the offspring, and what percentage of the offspring is likely to show the dominant phenotype?

12

Some animals, such as cows, normally produce only one offspring from each mating. If a cow showed a dominant phenotype, why would a typical testcross be a difficult way to determine the genotype of that animal?

13

What proportion of the offspring will be dominant for both traits?

14

What proportion of the offspring will have the same genotype as their parents?

15

What proportion of the offspring will be homozygous dominant for both traits?

16

What proportion of the offspring will be homozygous recessive for both traits?

17

What is the difference between a dominant trait and a recessive trait?

18

Differentiate genotype from phenotype.

19

What is the difference between homozygous and heterozygous?

20

A procedure in which an individual of an unknown genotype is crossed with a homozygous recessive individual to determine the genotype of the unknown individual is called a...

21

What's a gene?

22

An example of a genotype of a heterozygous individual is...

23

Segregation of alleles occurs during...

24

Phenotypes can appear to be altered by...

25

What do punnett squares do?

26

What's probability?

27

Probability equals...

28

What's a monohybrid cross?

29

What's a dihybrid cross?

30

When the two allele pairs are the same... they're

31

When the two allele pairs are different... they're

32

What's genotypic ratio?

33

What's phenotypic ratio?

34

This cross is an example of...

35

This cross is an example of...

36

This cross is an example of...

37

This cross is an example of...

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