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Mendelian Genetics + DNA

Total questions: 51

Worksheet time: 4hrs 15mins

Name
Class
Date
1.

Who is the "father" of modern genetics?

a)

Gregor Mendel

b)

Andreas Vesalius

c)

James Watson

d)

Charles Darwin

2.

a trait that is always expressed if present is _____________________

a)

Recessive

b)

Dominant

c)

Strong

d)

True

3.
Gregor Mendel's "P" generation consisted of purple flower plants crossed with white flower plants. What were the results of this cross?
a)
All purple flower offspring
b)
All white flower offspring
c)
Some purple flowers and some white flowers
4.
A __________ is a segment of DNA that codes for a particular protein, which leads to a particular trait.
a)
Gene
b)
Allele
c)
Codon
d)
Nucleotide
5.

Genes determine the characteristics, or __?__, that an individual can have.

a)

chromosomes

b)

cells

c)

genetics

d)

traits

6.

Sections of DNA on a chromosome are called:

a)

nuclei.

b)

RNA.

c)

genes.

d)

traits.

7.

Mendel also observed seed color in pea plants. In a study of several generations, yellow seeds appeared more frequently than green seeds. Which of the following is most likely the reason for this observation?

a)

Green seeds are dominant to yellow seeds.

b)

Yellow seeds are recessive to green seeds

c)

Green seeds are recessive to yellow seeds.

8.

The study of heredity is called ....

a)

biology

b)

genetics

c)

chemistry

9.
What did Gregor Mendel use to discover the principles that rule heredity?
a)
Pea Plant
b)
Pigeons
c)
Pear trees
d)
Photosynthesis
10.
Before Mendel how did people think you got your traits
a)
equal from each parent
b)
more from the dad
c)
more from the mom
d)
from a stork
11.

Passing on traits from parents to offspring

a)

Chromosome

b)

Genotype

c)

Heredity

d)

Allele

12.

Genes are found on

a)

chromosomes

b)

proteins

c)

alleles

d)

gametes

13.

What does DNA determine?

a)

traits of living things

b)

traits of nonliving things

c)

organization of living things

d)

Did Not Attempt

14.

What is the shape of DNA?

a)

double helix

b)

single helix

c)

squiggle

d)

twisty step looking thing

15.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
16.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
17.

How many chromosomes do human cells have?

a)

46

b)

23

c)

2

d)

44

18.
What is a gene?
a)
A bundle (like a hot dog bun) that the DNA is packed into
b)
something inside the nucleus
c)
a piece of DNA
d)
all of your DNA
19.

Bundled up, organized DNA is called a

a)

gene

b)

trait

c)

chromosome

d)

nucleotide

20.
What are the four nitrogen bases?
a)

A, T, C, G

b)

L, M, A, T

c)

L, A, C, G

d)

C, G, U, M

21.

a trait that is always expressed if present is _____________________

a)

Recessive

b)

Dominant

c)

Strong

d)

True

22.

Which of the following is correct?

a)

Yy is homozygous dominant.

b)

YY is heterozygous.

c)

yy is homozygous recessive.

d)

YY is homozygous recessive.

23.

Which of the following represents a heterozygous genotype?

a)

Aa

b)

AA

c)

aa

d)

Ab

24.

A recessive trait would appear in the phenotype of which of these?

a)

BB

b)

bb

c)

Bb

d)

Bf

25.

The following physical descriptions are ​ (a)   hair color, eye color, height.

Choose from the below words
phenotypes
genotypes
26.

The following genotypes are ​ (a)   ​ : Tt, Mm and Gg​ ​

Choose from the below words
heterozygous
homozygous
27.

The same gene can come in different versions, the different versions of a gene are called

(a)  

Choose from the below words
Alleles
Chromosomes
Traits
28.
Which combination is Homozygous Dominant
a)
HH
b)
Hh
c)
hh
d)
hH
29.

Which Combination is Heterozygous

a)

AA

b)

Aa

c)

aa

d)

none of the above

30.

Which of the following would produce a recessive phenotype?

a)

hh

b)

Rr

c)

Ww

d)

BB

31.

Which of the following is heterozygous?

a)

MM

b)

Mm

c)

mm

32.

Which of the following is homozygous dominant?

a)

RR

b)

Rr

c)

rr

33.

Which of the following is homozygous recessive?

a)

QQ

b)

Qq

c)

qq

34.

What term denotes the physical expression of a gene?

a)

genotype

b)

phenotype

c)

appearance

d)

homologous

35.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
36.
A ________________________ is used to predict the possible genotype from certain parents
a)
Mendel Grid
b)
Genetic Tic Tac Toe
c)
Punnett Square
d)
Pedigree Plot
37.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
38.
Which is a true statements about this picture?
a)
Brown is recessive
b)
Brown is dominant
c)
Blue is dominant
d)
Blue is codominant
39.
T1 - What is the cause of some traits "skipping" a generation?
a)
dominant traits
b)
recessive traits
c)
hybrid alleles
d)
homologous chromosomes
40.
What percentage of the offspring will be heterozygous dominant?
a)
100%
b)
75%
c)
50%
d)
25%
41.
The trait that always shows. 
a)
Dominant 
b)
Recessive
c)
Hidden
d)
Overt
42.
If a trait is homozygous the letters are the 
a)
Same
b)
Different
43.
If a trait is heterozygous, the letters (alleles)are 
a)
The same 
b)
Different
44.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
45.
B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
46.
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?
a)
0%
b)
25%
c)
50%
d)
75%
47.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
48.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
49.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
50.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 
a)
50 % Brown Hair and 50% Blond Hair 
b)
25 % Brown Hair and 75% Blond Hair 
c)
75 % Brown Hair and 25% Blond Hair 
d)
0% Brown Hair and 100% Blond Hair 
51.

If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?

a)

25%

b)

50%

c)

75%

d)

100%

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