Free Printable Unit 5 Meiosis & Genetics Part II- Mendelian Genetics

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Unit 5 Meiosis & Genetics Part II- Mendelian Genetics

Total questions: 42

Worksheet time: 2hrs 5mins

Name

Class

Date

What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?

Genesis

Elective traits

Alleles

Quadrants

What do we call the result of the genotype (for example, the color of the peas)?

Visible traits

Physiotrait

Genotype 2

Phenotype

If green is dominant over purple, then what is the genotype for this individual?

Purple

Green

Another word for homozygous is...

purebred

hybrid

heterozygous

dominant

Tt is-

homozygous dominant

homozygous recessive

heterozygous

none of these

If a pea plant were homozygous recessive for height, how would its alleles be represented?

Gregor Mendel's "P" generation consisted of purple flower plants crossed with white flower plants. What were the results of this cross?

All purple flower offspring

All white flower offspring

Some purple flowers and some white flowers

A __________ is a segment of DNA that codes for a particular protein, which leads to a particular trait.

Gene

Allele

Codon

Nucleotide

Which of the following best describes a GENOTYPE?

The allele/genetic makeup of an organism.

The physical expression of a trait.

10.

Which of the following is an example of a heterozygous genotype?

11.

The letters on the TOP AND SIDE of a punnett square represent ______________.

The combination of alleles in offspring.

The possible alleles given by the parents following meiosis.

The genotype and phenotype of offspring.

The results of genetic mutations in offspring.

12.

What is the predicted percentage of homozygous recessive offspring in this cross?

25%

50%

75%

13.

This type of inheritance pattern shows BOTH traits in possible offspring

complete dominance

incomplete dominance

co-dominance

dominant pattern

14.

Why do we see only tall plants in the second generation?

The gene for tall height is dominant

The gene for short height is dominant

The gene for tall height is recessive

The parents did not have the tall gene

15.

The dominant trait in this punnett square is

yellow pea seeds

green pea seeds

there is no dominant seed

16.

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

0 %

25%

50%

75%

17.

How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?

There is no difference

The heterozygous genotype has a unique phenotype

There is no heterozygous genotype

There is only one phenotype regardless of genotype.

18.

this image is an example of

codominance

dominance

incomplete dominance

19.

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:

all black

all white

all gray

speckled black and white

20.

In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.

Red = RR, white = rr, speckled = Rr

Red = RR, white = WW, speckled = rw

Red = RR, white = ww, Speckled = Rw

Red = RR, white = WW, speckled = RW

21.

Black hair color is dominant to white hair color in mice. Determine the phenotypic ratio for the offpring of a heterozygous black mouse and a white mouse.

4 Black: 0 White

3 Black: 1 White

2 Black: 2 White

0 Black: 4 White

22.

Genetic crosses involving a particular type of flower exhibit complete dominance with respect to petal color. Red (R) is dominant to white (r). Using the Punnett square, what is the expected percentage of offspring that will have white flowers from a cross of parent flowers with a genotype of Rr.

25%

50%

100%

23.

Tay-Sachs disease is a lethal, autosomal recessive genetic disorder. If both parents are heterozygous carriers of the disease, what are the chances of them having a child who is also a heterozygous carrier for Tay-Sachs?

25%

50%

75%

24.

Phenylketonuria (PKU) is inherited as a recessive condition. A man with PKU marries a woman without any alleles for PKU. What is the probability that their child will inherit PKU?

25%

50%

75%

25.

In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?

100% purple flowers

100% white flowers

75% white flowers, 25% purple flowers

25% white flowers, 75% purple flowers

26.

The genotype Aa is called . . .

Homozygous recessive

Hybrid

Purebred

Homozygous dominant

27.

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

Tall = T
Short = S

Tall = T
Short = t

Tall = t
Short = T

Tall = TT
Short = tt

28.

What you see, or the physical appearance.

Genotype

Phenotype

Homozygous

Heterozygous

29.

Which of the following genotypes is Purebred? Select 2 answers.

30.

If you have a parent who has GgBb as their genotype, what are the possible alleles they could donate to their gametes?

GB, Gb, gB, gb

GB, GB, gb, gb

Gb, Gb, Gb, GB

GG, BB, gg, bb

31.

T4 - Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?

25%

50%

100%

32.

T4 - What genotype is missing from this Punnett Square?

RrYy

RRYY

rryy

RrYY

33.

T4 - Based off this Punnett Square, what fraction of the offspring will have wrinkled, yellow seeds?

9/16

3/16

1/16

16/16

34.

In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti are crossed. What percentage of their offspring are expected to have short arms?

25%

75%

100%

35.

Who was Gregor Medel

A scientist and priest who studies pea plant traits.

The "father" of modern genetics.

He discovered patterns of inheritance.

All of the statements above are correct.

36.

What was the main pattern Mendel discovered? (Choose more than one.)

Two pea plants would have exactly the same kind of offspring?

Each parent gives 1/2 of their directions/code for traits to the offspring.

He could make a good hypothesis what the offspring might look like using the Law of Probability and Punnett squares.

Pea plants could show totally different traits than the parent plant had.

37.

While Mendel was alive what was true of his work as a scientist. (Pick more than one.)

He had several students learning his methods from him.

His work was ignored for years until about 1900.

A college was opened and other scientists worked with him.

He was a researcher who documented great notes we still use today in the study of modern genetics.

38.

Mendel crossed two hybrid yellow seeded plants (Yy) and using probability he discovered....

All the new plants were yellow (Y) (100%) 4:4

One of the new plants was green (yy) 25% 1:4

None of the plants grew at all.

All of the new plants were green (yy) 100% 4:4

39.

What is the chance a coin will land heads up?

100%

25%

33%

50%

40.

A dominant gene is written on a Punnett Square as a:

Capital letter (Y)

Percentage (%)

Lower case letter (y)

A number (#)

41.

A recessive trait is written on a Punnett Square as a:

Capital letter (Y)

A percentage (%)

A lower case letter (y)

A number (#)

42.

If your genotype is Bb, then you can only pass a B or b to your child but you can't pass both.

Law of Dominance

Law of Segregation

Law of Independent Assortment

100 %

Unit 5 Meiosis & Genetics Part II- Mendelian Genetics

Total questions: 42

Worksheet time: 2hrs 5mins

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