please help me with these two
1. What does the symbol TT mean to someone who studies genetics?
a heterozygous
b a phenotype
c purebred
d hybrid
2.
Marty is a rat that has a long tail (T). He is heterozygous for this trait. Missy is a rat without a tail (t), so she is homozygous recessive.
If Marty and Missy had a baby rat, what would its chance be of having a long tail?
a 0% chance of having a long tail
b 50% chance of having a long tail
c 75% chance of having a long tail
d 100% chance of having a long tail
https://www.jiskha.com/questions/1822365/what-does-the-symbol-tt-mean-to-someone-who-studies-genetics
1. To someone who studies genetics, the symbol TT represents the genotype of an organism for a specific trait. In genetics, symbols like this are used to represent alleles, which are different forms of a gene. In this case, TT represents that both alleles present for the trait are the same and dominant.
To get the answer, you need to understand the meaning of the symbols and their corresponding genetic concepts. In this case, TT represents purebred or homozygous dominant, where both alleles are dominant for the trait. Therefore, the correct answer is "c) purebred".
2. To determine the chance of the baby rat having a long tail, we need to consider the inheritance pattern of the trait. In this scenario, Marty is heterozygous for the trait (Tt), which means he carries one allele for a long tail (T) and one allele for no tail (t). Missy is homozygous recessive (tt), carrying two alleles for no tail.
To get the answer, you need to understand the principles of Mendelian genetics and the Punnett square method. By using a Punnett square and combining the alleles from Marty and Missy, we can determine the possible genotypes and phenotypes of their offspring. In this case, the possible genotypes are Tt and tt, where Tt represents having a long tail and tt represents having no tail.
Since only one out of the two possible genotypes (Tt) has a long tail, the chance of their baby rat having a long tail is 50%. Therefore, the correct answer is "b) 50% chance of having a long tail".