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There is a 50 percent chance the genotype of the offspring will contain a dominant geneCould this count as a correct way to explain the outcome of a punnet square?
Wiki User
∙ 14y ago
No. The punnet square should yield 75% dominant. If the sides of the square are A and a versus A and a, capital A meaning the dominant gene, which expresses over the recessive gene "a" whenever it is present, then the possible outcomes in the square are: AA, Aa. aA, and aa. Three out of four, or 75%, are dominant.
Wiki User
∙ 14y ago
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What is the probability that an egg cell from a female with genotype RR will contain the recessive allele?
Zero. If it's RR that means it only contains the dominant allele
When two pea plants that are heterozygous for yellow peas are crossed.the resulting offspring have a genotypic ratio of?
Because heterozygous means that the parents contain both dominant and recessive genes the offspring will be 75% tall and 25% short. If you were to draw the punnett squares you would see that there are 3 possible children one with only dominant tall traits two with both dominant and recessive traits and one with only recessive traits.
How are traits inherited from parents to offspring?
Each parent passes on half of their DNA to their offspring. DNA is the code that determines how every single thing in the body is built. So each offspring gets the instructions for half of their body building plan from the mother and half from the father.
What gametes can be formed by an individual with the genotype Aa?
Half of the gametes will contain the A allele, and half will contain the a allele.
What kind of offspring will a homozygous tall plant and a homozygous short plant have?
Presuming tall is a dominant allele (the 2nd parent is heterozygous and "tall" is it's phenotype), then the square would be as follows: Let T be the dominant gene for tall, and thus every genotype containing this (TT, or Tt) would produce a tall plant. Let t be recessive, and in the absence of T (tt) causes a plant to be small. So the homozygous tall parent would be TT, and the heterozygous tall parent would be Tt. So now you just have to cross them. During meiosis, every gamete from the TT genotype would contain a T allele. However, for the Tt genotype, there is equal chance each gamete will contain EITHER a T or a t. So the square would be: xxTxxT TxTTxTT txTtxTt As you can see, 2 out of the 4 offspring have a Tt genotype (heterozygous), so this translates to a 1/2 fraction, or 50%. Ignore the Xs in the table- if i just used spaces then all the letters crunched up on top of each other when i pressed save...it was the best i could do...:S
What type allele are present in an organism with a QQ genotype?
Capital letters usually denote dominant alleles. Therefore QQ genotype would contain two dominant alleles for the Q genotype.
What type of alleles are present in an organism?
Capital letters usually denote dominant alleles. Therefore QQ genotype would contain two dominant alleles for the Q genotype.
What is the probability that an egg cell from a female with genotype RR will contain the recessive allele?
Zero. If it's RR that means it only contains the dominant allele
If a dominant homozygous reproduced with a heterozygous could their offspring be recessive?
Let's see what combinations can be formed.HH, HH, Hh, Hh.So, yes their offspring can contain the recessive allele.(THe offspring can be a carrier of the recessive allele.)However, since it is impossible for the offspring to be homozygous recessive,the recessive trait/gene will not show in the offspring's phenotype.Hope that helps!
When two pea plants that are heterozygous for yellow peas are crossed.the resulting offspring have a genotypic ratio of?
Because heterozygous means that the parents contain both dominant and recessive genes the offspring will be 75% tall and 25% short. If you were to draw the punnett squares you would see that there are 3 possible children one with only dominant tall traits two with both dominant and recessive traits and one with only recessive traits.
What must the genotype of an X-linked recessive trait be for a woman to express it?
If the woman does not show the trait, she must have a dominant allele (version of the gene); let's call it A. She also carries the recessive gene, a. So her genotype is Aa. This means that half her ova (gametes) will contain the dominant A, half a.The rest is up to the sperms; half of them will carry an X chromosome, with either A or a on it (unless there are more than two alleles involved).
Does southeast Asia contain a dominant country?
Yes, and it is Thailand.
Why does the dad determine the gender of the baby?
Women have only X chromosomes. Men have one X and one Y. If the man's sperm has an X chromosomes, the child will be a girl. If the man's sperm has a Y chromosome, the child will be a boy.
How are traits inherited from parents to offspring?
Each parent passes on half of their DNA to their offspring. DNA is the code that determines how every single thing in the body is built. So each offspring gets the instructions for half of their body building plan from the mother and half from the father.
What are some human traits that are caused by multiple alleles?
The heredity of the ABO blood groups are governed by multiple alleles.
What you see of a organism due to genotype?
Due to a genotype, which basically mean codes that can produce proteins, a phenotype is observed. Genes contain information for protein synthesis. The proteins produced in turn produce an externally observable character or trait. This external appearance produced due to the effect of a genotype is phenotype.
What gametes can be formed by an individual with the genotype Aa?
Half of the gametes will contain the A allele, and half will contain the a allele.
