Chapter 6A

Question 0

What kind of plants did Mendel use in his experiments?

Answer 0

Pea plants (7 straits on photo)

Question 1

This is the study of the inheritance, or the passing of traits from parents to offspring

Answer 1

Generics

Question 2

In Mendel’s experiment, was the F1 generation produced from a purebred cross or a hybrid cross?

Answer 2

Purebred cross

Used only tall plants with history of being tall for pollen (sperm) and only short plants for pistols (eggs)

Question 3

How are alleles for dominant traits represented?

Answer 3

?

Question 4

An organism with the genotype Aa is

a. hybrid recessive.
b. purebred recessive.
c. hybrid.
d. purebred dominant.

Answer 4

?

Question 5

(True or False) A cross between a pea plant purebred for inflated pods and a pea plant purebred for constricted pods would produce only inflated-pod offspring.

Answer 5

?

Question 6

Red apples is an example of a
a. phenotype. c. hybrid characteristic.
b. dominant trait. d. genotype.

Answer 6

?

Question 7

The allele for arched feet is dominant over the allele for flat feet. Write the genotype of someone who has flat feet.

Answer 7

?

Question 8

What is the difference between purebred and hybrid?

Answer 8

.

Question 9

Explain the difference between dominant
alleles and recessive alleles.

Answer 9

?

Question 10

Explain the relationship between genotype and phenotype.

Answer 10

Phenotype is an organisms physical characteristics (tall, shirt, green, round)

Genotype is an organism’s genes (factors)

Question 11

Units of heredity are called genes.

Answer 11

Genes

Question 12

He was a Catholic monk and scientist. He experimented with pea plants to investigate how organisms inherit their traits. He studied 7 different traits….

Answer 12

Gregor Mendel

Question 13

Mating organisms to test how they inherit traits is called a _____?

Answer 13

Cross

Mendel used tall and short pea plants that were always tall or short. Then he crossed them

Question 14

Bonus Question?

In plants, the pollen contains the male sperm, and the pistil contains the female egg

Answer 14

Bonus question?

Question 15

F1 abbreviation

Answer 15

First offspring generation, or “filial,” derived from the Latin word filius, which means “son.”

Question 16

Mendel Pea Plants

F1 and F2 photo

Answer 16

Purebred cross: T mated a t and only created Tt, all plants were tall because T is dominate

Hybrid cross: Then he mated Tt with Tt, and result was TT, Tt, tT and tt, so 3/4th were tall

Question 17

Mendel made theories after pea plant experiment. One theory was that the traits he was studying were controlled by _____?

Answer 17

factors.

One factor for each trait was supplied by the pollen, and another factor for each trait was supplied by the egg. Thus, each offspring had two factors for each trait, one from each parent. Sort of like “genes”

Question 18

Why was Mendel’s theory about “factors” not quite accurate?

Answer 18

He said each parent supplied one “factor”. Truth is diploid organism have two genes (factors) for each trait, one from each parent.

Question 19

The different forms (factors) of a gene for a particular trait are called _____?

Answer 19

Alleles

T and t are the two alleles for plant height gene

Question 20

If an organism’s two alleles for a trait are the same, (T, T) or (t, t), the organism is _____ for that trait.

Answer 20

Purebred

Question 21

If a two alleles for a trait are NOT the same (T,t) then that organism is a _____ for this trait.

Answer 21

Hybrid

Question 22

Mendel’s other theory suggested each allele for a trait was either dominant or recessive. When a plant had two dominant alleles for a trait, the plant showed the ______ trait. When both alleles in the set were recessive, the plant showed the ______ trait.

Answer 22

Dominant trait (T,T)

Recessive trait (t,t)

Question 23

The way a plant or any organism looks is called its _______. (Tall, short, yellow, round are all physical characteristics)

Answer 23

Phenotype = physical characteristics

Question 24

The specific factors (genes) an organism contains are called its ______.

You cant tell by looking at physical characteristics (phenotype)

Answer 24

Genotype

Question 25

When mating two hybrid organisms, (T,t) with a (T,t), the offspring can have three results:

Answer 25

purebred dominant
hybrid
purebred recessive

Question 26

Who was called the father of genetics?

Answer 26

Mendel

100 years after his “single trait theory”, scientists learned about genes and DNA.

Question 27

Examples of Dominant/ Recessive Traits in Humans

Dominant: dimples, roll tongue, unattached earlobes, long eye lashes, cleft chin, thick lips, arched feet, widows peak, farsighted, nearsighted

Recessive: lacks dimples, cannot roll tongue, attached earlobes, short eyelashes, smooth chin, thin lips, flat feet, straight hairline, normal signt

Answer 27

Dominate or recessive

Question 28

If a person has two dominant alleles for simples he is _____. If he has one dominant allele and one recessive allele, he is _____ for dimples

Answer 28

Purebred

Hybrid

Question 29

True or False: Recessive traits (t,t) are exhibited only when dominant alleles are not present. As a result, a person without dimples has only recessive alleles.

Answer 29

True