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How do you make and interpret Punnet squares for Autosomal and sex-linked traits?
The simplest type of Punnet square is a 2x2 square. You split up the alleles for mother and father and place them on the sides of the large square. Then you "drop" them to determine the possible genotypic and phenotypic ratios. For example, if the mom is Aa and the dad is Aa as well, then using the square, the possible combinations will be AA, 2 Aa, and aa. In this case, assuming A is the dominant allele, then there will be a 3:1 ratio of dominant phenotypes to recessive phenotypes. The genotype ratio will be 1:2:1, indicating 1 homozygous dominant, 2 heterozygous and 1 homozygous recessive genotypes.
This can be done for sex linked traits too. Use XX and XY for the parents and make the same box. For example, if it is an X linked recessive disorder and it is between XY and XX' then the possible outcomes are XX, XX', XY and X'Y. Here there is a 1/2 chance that the child, regardless of gender will be normal, 1/4 that the child (girl) will be normal but a carrier and 1/4 that the child (boy) will be affected.
What else can I help you with?
How do you work punnet squares?
A punnet square is a box of 4 sections
What are the letters in punnet squares called?
gametes
What is the name of the squares used to determine the probability of a certain traits?
Punnet Squares
What is used to store hereditary information?
Punnet Squares
What has to do with genetics?
DNA, parents, punnet squares, alleles, and genes.
What can be used to help predict the probability of genetics?
Punnet squares.
Why do scientists choose to use punnet squares to describe various traits?
They use punnet squares because it is easy, and accurate. It gives them the probability of the traits, and what the traits are by using upper case, and lower case letters.
Can you use Mendel in a sentence?
Gregor Mendel was a naturalist who created Punnet Squares.
What are punnent squares and how are they used?
Punnet squares are used mainly by doctors to determine a baby's chances of inherating an trait of disease from it's parents.
What is punnet squares?
A punnet square is a diagram showing the gene combination that might result from a genetic cross and it can be bigger than 2x2A diagram that is used to predict an outcome of a particular cross or breeding experiment is called punnet square.
What are the types of homozygous traits you can get from punnet squares?
AA: Homozygous dominant aa: Homozygous recessive
What is a punnets square used to determine?
Punnet squares help determine what trait will show up in offspring of two living things. They show all the possible match-ups of dominant and recessive genes, and show you what percent chance it is that a child will have a certain trait. Punnet squares are used for one trait.
