The study of genes and inheritance is called genetics. There are two types of alleles and these are recessive and dominant.
The correct answer is 75%.
Tall stems are dominant over short stems. Let T represent tall and t represent short. The parents are Heterozygous tall plants, which means that their genotype would be Tt and their phenotype would be tall. In a Punnett square it would look like this:
T t
T TT Tt
t Tt tt
Notice that we have 3 possible genotype combinations. When the dominant allele T is present that means that the phenotype that will be expressed is the dominant trait. In this case, we have the following genotype and phenotype:
TT Tall 1/4
Tt Tall 2/4
tt Short 1/4
The question is asking the chance the offspring phenotype is the same as the parent specifically so we can see that 3/4 are tall.
Hence, the correct is 3/4 = 75%.
For more information about the genes, refer to the link:-
Answer:
75%
Explanation:
Tall stems are dominant over short stems. Let T represent tall and t represents short. The parents are Heterozygous tall plants, which means that their genotype would be Tt and their phenotype would be tall. In a Punnett square it would look like this:
T t
T TT Tt
t Tt tt
Notice that we have 3 possible genotype combinations. When the dominant allele T is present that means that the phenotype that will be expressed is the dominant trait. In this case we have the following genotype and phenotype:
TT Tall 1/4
Tt Tall 2/4
tt Short 1/4
The question is asking the chance the pffspring phenotype is the same as the parent specifically so we can see that 3/4 are tall.
3/4 = 75%
b. False
Answer: FALSE (just took the test)
The following choices are given;
A. XrXr. B. XrY. C. XRY D. XRXr
The answer is B. This is because the presence of the Y chromosome determines gender- which is male. In addition, it carries few genes than the X sex chromosome. Therefore, in this case, the X chromosome brings in the receive allele for eye color while the Y chromosome has no corresponding allele.
In most diploid organisms, they are two types of alleles for most genes which each on each set of chromosomes and at the same loci. In most cases, one allele is dominant over the other meaning that its presence masks the effect of the recessive allele. In the absence of the dominant allele, the recessive allele is expressed . Usually, the recessive gene is disadvantageous to the individual.