WorksheetsPedigree Chart Practice
Total questions: 50
Worksheet time: 31mins
In a pedigree chart, a male is represented by a
circle
square
horizontal line
vertical line
In a pedigree chart, a female is represented by a
circle
square
horizontal line
vertical line
In a pedigree chart, a marriage/relationship is represented by a
circle
square
horizontal line
vertical line
In a pedigree chart, a child produced from a couple is represented by a
circle
square
horizontal line
vertical line
When can a chart have half-shaded individuals?
ONLY when charting traits.
ONLY when charting genes.
There can be half-shaded individuals when charting genes OR traits.
When creating a pedigree chart, individual numbers
should be written below the shape.
should be written above the shape.
should be written inside the shape.
are optional.
When creating a pedigree chart, generation numbers
should be written to the left of each each row.
should be written to the right of each each row.
are optional.
You always shade in whatever the chart is charting. For example:
Charting a recessive gene - shade in the recessive genes people have.
Charting a dominant trait - shade in those with the dominant trait.
true
false
Chart 1: How many marriage line are there?
6
9
2
Chart 1: How many children line are there?
6
9
2
Chart 1: How many females are in the second generation?
3
2
6
4
Chart 1: How many males are there on the chart?
1
2
6
4
Chart 1: Individual 4 in G2 is married to
individual 2 in G1
individual 3 in G2
individual 2 in G3
individual 5 in G2
Chart 1: How many children did the couple in the first generation have?
1
5
3
2
Chart 2: (FYI: Charting the dominant gene that causes a widow's peak, which is a point in the hairline on the forehead. W = widow's peak, w = no widow's peak)
If an individual is half-shaded, they have ___ gene(s) for a widow's peak and their genotype is ____.
1
Ww (heterozygous)
2
WW
(homozygous dominant)
2
ww (homozygous recessive)
0
WW (homozygous dominant)
0
ww (homozygous recessive)
Chart 2: Charting the dominant gene for a widow's peak.
(W = widow's peak, w = no widow's peak)
If an individual is fully shaded, they have ___ gene(s) for a widow's peak and their genotype is ____.
1
Ww (heterozygous)
2
WW
(homozygous dominant)
2
ww (homozygous recessive)
0
WW (homozygous dominant)
0
ww (homozygous recessive)
Chart 2: Charting the dominant gene for a widow's peak. (W = widow's peak, w = no widow's peak)
If an individual is empty, they have ___ gene(s) for a widow's peak and their genotype is ____.
1
Ww (heterozygous)
2
WW
(homozygous dominant)
2
ww (homozygous recessive)
0
WW (homozygous dominant)
0
ww (homozygous recessive)
Chart 2: Charting the dominant gene for a widow's peak. (W = widow's peak, w = no widow's peak)
If an individual is empty, their phenotype is ____.
widow's peak
no widow's peak
Ww (heterozygous)
WW (homozygous dominant)
ww (homozygous recessive)
Chart 2: Charting the dominant gene for a widow's peak. (W = widow's peak, w = no widow's peak)
If an individual is fully shaded, their phenotype is ____.
widow's peak
no widow's peak
Ww (heterozygous)
WW (homozygous dominant)
ww (homozygous recessive)
Chart 2: Charting the dominant gene for a widow's peak. (W = widow's peak, w = no widow's peak)
If an individual is half-shaded, their phenotype is ____.
widow's peak
no widow's peak
Ww (heterozygous)
WW (homozygous dominant)
ww (homozygous recessive)
Chart 2: Charting the dominant gene for a widow's peak. (W = widow's peak, w = no widow's peak)
Which parent did individual 2 in G2 get a dominant gene from?
mother
father
both
Chart 2: Charting the dominant gene for a widow's peak. (W = widow's peak, w = no widow's peak)
What type of gene did individual 1 in G3 get from his father?
dominant
recessive
Chart 2: Charting the dominant gene for a widow's peak. (W = widow's peak, w = no widow's peak)
Could individual 1 in G3 ever have a child with no widow's peak?
no
yes, if the mother was heterozygous or homozygous recessive
yes, if the mother was heterozygous or homozygous dominant
Chart 3: (FYI: Charting the recessive gene that causes albinism, which means a person does not produce color pigments in the hair, skin, or eyes. The person is referred to as an albino.
N = normal coloration, n = albinism-albino)
If an individual is half-shaded, they have ___ gene(s) for albinism and their genotype is ____.
1
Nn (heterozygous)
2
NN (homozygous dominant)
2
nn (homozygous recessive)
0
NN (homozygous dominant)
0
nn (homozygous recessive)
Chart 3: (Charting the recessive gene for albinism.
N = normal coloration, n = albinism-albino)
If an individual is fully shaded, they have ___ gene(s) for albinism and their genotype is ____.
1
Nn (heterozygous)
2
NN (homozygous dominant)
2
nn (homozygous recessive)
0
NN (homozygous dominant)
0
nn (homozygous recessive)
Chart 3: (Charting the recessive gene for albinism.
N = normal coloration, n = albinism-albino)
If an individual is empty, they have ___ gene(s) for albinism and their genotype is ____.
1
Nn (heterozygous)
2
NN (homozygous dominant)
2
nn (homozygous recessive)
0
NN (homozygous dominant)
0
nn (homozygous recessive)
Chart 3: (Charting the recessive gene for albinism.
N = normal coloration, n = albinism-albino)
How many individuals on the chart are albinos?
1
5
3
8
6
Chart 3: (Charting the recessive gene for albinism.
N = normal coloration, n = albinism-albino)
How many individuals on the chart are carriers for albinism?
1
5
3
8
6
Chart 3: (Charting the recessive gene for albinism.
N = normal coloration, n = albinism-albino)
If individual #3 in G2 had instead had children with #1 in G2, could any of their children have been albino?
no
yes
we can't tell from the chart
Chart 4: (The trait being charted is bushy eyebrows which is dominant to the trait of fine eyebrows.
B = bushy eyebrows, b = fine eyebrows)
How many individuals on the chart have bushy eyebrows?
6
10
4
Chart 4: (The trait being charted is bushy eyebrows which is dominant to the trait of fine eyebrows.
B = bushy eyebrows, b = fine eyebrows)
If an individual is fully shaded, that means ____.
they have bushy eyebrows and are EITHER BB or Bb.
they have bushy eyebrows and DEFINITELY BB.
they have fine eyebrows and are DEFINITELY bb.
they have fine eyebrows and are EITHER bb or Bb.
Chart 4: (The trait being charted is bushy eyebrows which is dominant to the trait of fine eyebrows.
B = bushy eyebrows, b = fine eyebrows)
If an individual is empty, that means ____.
they have bushy eyebrows and are EITHER BB or Bb.
they have bushy eyebrows and DEFINITELY BB.
they have fine eyebrows and are DEFINITELY bb.
they have fine eyebrows and are EITHER bb or Bb.
Chart 4: (The trait being charted is bushy eyebrows which is dominant to the trait of fine eyebrows.
B = bushy eyebrows, b = fine eyebrows)
What can you conclude the genotypes of individuals 1 and 2 in G1 must be? _______ and ______
BB and BB
Bb and Bb
BB and Bb
Bb and bb
Chart 4: (The trait being charted is bushy eyebrows which is dominant to the trait of fine eyebrows.
B = bushy eyebrows, b = fine eyebrows)
What type of gene did individual 1 in G3 get from her mother?
dominant
recessive
Chart 4: (The trait being charted is bushy eyebrows which is dominant to the trait of fine eyebrows.
B = bushy eyebrows, b = fine eyebrows)
Could individuals 4 and 5 in G2 ever have a child with bushy eyebrows?
no
yes
Chart 4: (The trait being charted is bushy eyebrows which is dominant to the trait of fine eyebrows.
B = bushy eyebrows, b = fine eyebrows)
How likely was it that individual 3 in G2 would have fine eyebrows?
100%
75%
50%
25%
0%
Chart 5: (The trait being charted is hitchhiker's thumb. The dominant trait is straight thumb.
S = straight thumb, s = hitchhiker's thumb)
Which individuals in G1 have a hitchhiker’s thumb? (check all that apply)
individual 1
individual 2
individual 3
individual 4
Chart 5: (The trait being charted is hitchhiker's thumb. The dominant trait is straight thumb.
S = straight thumb, s = hitchhiker's thumb)
Which individuals in G2 have a hitchhiker’s thumb?
all of them
none of them
Chart 5: (The trait being charted is hitchhiker's thumb. The dominant trait is straight thumb.
S = straight thumb, s = hitchhiker's thumb)
Which individuals in G3 have a hitchhiker's thumb? (check all that apply)
individual 1
individual 2
individual 3
individual 4
Chart 5: (The trait being charted is hitchhiker's thumb. The dominant trait is straight thumb.
S = straight thumb, s = hitchhiker's thumb)
Which statement is true about the trait of hitchhiker's thumb in this family?
It skipped generations 1 and 3.
It skipped generation 2.
It never skipped a generation.
Chart 5: (The trait being charted is hitchhiker's thumb. The dominant trait is straight thumb.
S = straight thumb, s = hitchhiker's thumb)
For a trait to skip a generation, people in that generation must be carriers. Select all the individuals in G2 that MUST be carriers. (Hint: Look at their parents AND their children.)
1
2
3
4
5
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
Which chart is charting GENES?
A
B
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
Which chart is charting TRAITS?
A
B
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
According to Chart A, how many charted genes does individual 1 in G1 have?
1
2
0
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
According to Chart B, does individual 1 in G1 have the charted trait?
yes
no
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
Comparing the two charts, which is being charted – dominant or recessive?
dominant
recessive
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
How many individuals in the family are homozygous dominant?
1
3
5
6
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
How many individuals in the family are homozygous recessive?
1
3
5
6
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
How many individuals in the family are heterozygous?
1
3
5
6
Charts 6 and 7: (You will need to figure out what both charts are charting - dominant or recessive. Hints: 1) Both charts are the same people. 2) Both charts are about the same trait.
How many individuals in the family have the trait?
1
3
5
6
