Homework Answers
1) RR*rr
| R | R | |
| r | Rr | Rr |
| r | Rr | Rr |
the genotype of offspring is Rr
the phenotype of offspring can be red if this is completely dominant or can be pink if this is incomplete dominance
2) Tt*Tt
| T | t | |
| T | TT | Tt |
| t | Tt | tt |
genotypic ratio
1 TT: 2 Tt: 1 tt
phenotypic ratio
3 dominant: 1 recessive
3) test cross is the cross between recessive individual
a) homozygous dominant* recessive individual
let dominant allele be D and recessive allele be d then
DD*dd
| D | D | |
| d | Dd | Dd |
| d | Dd | Dd |
percentage of offspring with dominant trait= 100% all progenies are Dd
heterozygous * recessive individual
Dd*dd
| D | d | |
| d | Dd | dd |
| d | Dd | dd |
percentage of progeny with dominant trait=50% there are 2 Dd out of 4
4) let the dominant allele be B and recessive allele be b
man is blue-eyed so he is homozygous for the recessive allele bb and woman is brown eyed but her father is blue-eyed (bb) so she is heterozygous that is Bb so cross is Bb*bb
| B | b | |
| b | Bb | bb |
| b | Bb | bb |
percentage of blue eyes= number of bb/total number*100=2/4*100=50%
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3. A father with brown eyes marries a woman with blue eyes, and all of their children have brown eyes. (We are going to assume that this is a monogenetic trait, but in reality, t is not.) a. Assign symbols for the possible alleles. Brown:_ b. Which allele is dominant? Complete a Punnett square for the cross that results in all the offspring (the F1 generation) Blue having a brown-eyed phenotype C. What are the...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
7. If offspring exhibit a 3:1 phenotypic are the parents' genotypes? f purple flower color in a plant is controlled by the allele Rand white flower.com by the allele, which flower color is dominant? and white flower color is controlled 9. If a heterozygous purple flowered plant is crossed with a white flowered plant w phenotypes of their offspring? as 10. If the offspring of a cross are 50 purple-flowered plants and 14 white-flowered plants, what are the genotypes of...
pls the answer should be type because I have issues
with my eyes. Thanks
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