# Genetics 1 Revision

## Quiz by gizem

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7 questions
• Q1
having two of the same genes for the trait (sometimes called purebred).
dihybride
homozygous
heterozygous
monohybride
10s
• Q2
having two different genes for a trait (sometimes called hybrid).
heterozygous
dihybride
homozygous
monohybride
10s
• Q3
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
50 % BB and 50% Bb
100% BB
75% BB and 25%Bb
50% Bb and 50% bb
30s
• Q4
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
25 %
50 %
0 %
75%
30s
• Q5
If T=Tall & t=short, what is the genotypic ratio?
1:1
2:2
1:2:1
1:3
20s
• Q6
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
50% PP (purple); 50% pp (white)
25% PP, 50% Pp, 25% pp 75% purple, 25% white
50% Pp (purple); 50% pp (white)
100% Pp (purple)
30s
• Q7
Assuming that the probability of having a female child is 50% and the probability of having a male child is also 50%, what is the probability that a couple's first-born child will be female and that their second-born child will be male?
25%
0%
75%
50%
30s

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