Chapter 2.2: Genetic Analysis According to Mendel Flashcards

1
Q

How does a specific gene affect phenotype?

A

o A specific gene determines a specific enzyme whose activity may affect the phenotype in any number of ways depending on the biochemical pathway

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What does Mendel’s Law of Segregation state?

A

 Mendel’s Law of Segregation: the two alleles for each trait separate (segregate) during gamete formation, and then unite at random, one from each parent at fertilization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What do monohybrid crosses reveal?

A

• Monohybrid Crosses Reveal Units of Inheritance and the Law of Segregation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is an observable characteristic?

A

phenotype

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is an individual with a homozygous genotype?

A

homozygote

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Define phenotype

A

an observable characteristic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a mating in which an individual showing the dominant phenotype is crossed with an individual expressing the recessive phenotype?

A

testcross

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a dihybrid?

A

o A dihybrid individual is one that is heterozygous for 2 genes at the same time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do alleles relate to encoding proteins?

A

o The dominant allele determines a normally functioning protein, while the recessive allele does not encode a functional protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Define heterozygote

A

an individual with a heterozygous genotype

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Define genotype

A

alleles present in an individual

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What was the first filial (F1) generation in Mendel’s experiment?

A

 When crossed peas were all yellow; first filial (F1) generation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is an individual with a heterozygous genotype?

A

heterozygote

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a monohybrid cross?

A

cross between single trait hybrids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Define gametes

A

the specialized cells—eggs within the ovules of the female parent and sperm cells within the pollen grains—that carry genes between generations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are recombinant types?

A

o New phenotypic combinations in offspring are called recombinant types

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are individuals having two different alleles for a single trait?

A

monohybrids

18
Q

Define alleles

A

alternative forms of a single gene

19
Q

What is a branched-line diagram?

A

 A branched-line diagram shows all the possibilities for a gene in a sequence of columns

20
Q

What are the alleles present in an individual?

21
Q

Define monohybrids

A

individuals having two different alleles for a single trait

22
Q

Define punnett square

A

a simple and convenient method for tracking the kinds of gametes produced as well as all the possible combinations that might occur at fertilization

23
Q

Define homozygous

A

two of the same alleles for a trait

24
Q

What are alternative forms of a single gene?

25
What reveals units of inheritance and the law of segregation?
monohybrid crosses
26
What are the specialized cells—eggs within the ovules of the female parent and sperm cells within the pollen grains—that carry genes between generations?
gametes
27
What is the product rule?
o The product rule states that the probability of 2 or more independent events occurring together is the product of the probabilities that each event will occur by itself
28
What is the sum rule?
o The sum rule states that the probability of either of 2 such mutually exclusive events occurring is the sum of their individual probabilities
29
What was the parental (P) generation in Mendel's experiment?
o Mendel planted pure-breeding green and pure-breeding yellow peas and allowed them to grow into the parental (P) generation
30
What are matings between the F1 progeny of pure-breeding parents that differed in 3 or more unrelated traits?
multihybrid cross
31
Define homozygote
an individual with a homozygous genotype
32
What is a cross between single trait hybrids?
monohybrid cross
33
Define testcross
a mating in which an individual showing the dominant phenotype is crossed with an individual expressing the recessive phenotype
34
What are two different alleles for a trait?
heterozygous
35
What was the second filial (F2) generation in Mendel's experiment?
 Resulted in 3:1 ratio of yellow to green; second filial (F2) generation
36
Define heterozygous
two different alleles for a trait
37
What are two of the same alleles for a trait?
homozygous
38
What does the Law of Independent Assortment state?
 Law of Independent Assortment: During gamete formation, different pairs of alleles segregate independently of each other
39
Define multihybrid cross
matings between the F1 progeny of pure-breeding parents that differed in 3 or more unrelated traits
40
What is a simple and convenient method for tracking the kinds of gametes produced as well as all the possible combinations that might occur at fertilization?
punnett square