| Is it Dominant or Recessive | Monohybrid Cross | Dihybrid Crosses |
|---|---|---|
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The black is dominant
A black mouse is crossed with a white mouse. All the offsprings were black. What is the dominant trait?
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genotypes
Aa, DD, Bb, yy are all examples of
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100% Hetero Tall and Green Hetero
100% TtGg
A tall green pea plant that is homozygous dominant for both traits is crossed with a short yellow
pea plant that is homozygous recessive for both traits. What are the Phenotype and Genotypes of the offsprings? |
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BB or Bb
If Black phenotype is Dominant then its genotype will be
|
Phenotype: 50% White hetero 50% Ginger
Genotype: 50% Aa 50% aa
A white hetero cat is crossed with a ginger homo cat.
White is dominant. What are the probabilities of the offsprings? |
The cross: HhSs x hhss
Phenotype offspring: 8/16 furry 8/16 no fur 8/16 love sinks 8/16 hate sinks. Genotype offspring: 4/16 HhSs 4/16 Hhss 4/16 hhSs 4/16 hhss
Moo (a cat with fur, but her mom doesnt have fur. She also loves sitting in sinks, but her mother also didnt like sinks) is looking to get married. She is checking the genotypes of the grooms. One of them was homo furless and doesnt love sinks. ( being with fur is dominant and so is liking sinks). Moo wants to know her offsprings. Help her find it out:
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Round
A hetero round pea is crossed with a homo wrinkled pea. The ratio of round to wrinkled is 1:1. Which is the dominant trait.
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SS x SS or SS x Ss
In guinea pigs, the allele for short hair is dominant. If all the guinea pigs are born short haired what are the possible genotypes of the parents? (There are two possible combinations.)
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1/16
In a dihybrid cross, AaBb x AaBb, what fraction of the offspring will be homozygous for both recessive traits?
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one
How many alleles (letters) does a child get from each parent for each trait?
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50% will be normal
Rett syndrome is a dominant sex-linked disease. A normal female is married to a suffering male. What percentage of their offspring will be normal?
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4/16
Following a SsYy x SsYy cross, what fraction of the offspring are predicted to have a genotype that is heterozygous for both characteristics?
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Gg
In watermelons, green rinds (G) are dominant to striped rinds (g). What is the genotype of a heterozygous green watermelon?
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2/4 are hetero tongue rollers.
1/2 is the possibility of male. 2/8 is the probability of male rollers.
In humans, being a tongue roller is dominant over a non roller .A man who is a non roller marries a woman who is a heterozygous for rolling. What percent of the offsprings will be male rollers?Do factorial analysis.
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A) 4/16 albino
B) 4/32 male albino
If a hetero brown mouse carrying carrying albino is crossed with hetero black also carrying albino:
A) what percentage of the offsprings with be albino? B) What is the chance of having albino male? |
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