Which of the following species reproduces by internal fertilization?
a) cats
(b) Toads
(c) The fish
(d) alternative b and c
Answer:
(a) Los gatos
Explanation:
Only cats are capable of internal fertilization from the given choices above.
Internal fertilization is the fusion of gametes within an organism. This process occurs during sexual reproduction within the female.
- Toads and fishes exhibit external fertilization.
- External fertilization occurs where the male sperm externally fertilizes the eggs of the female.
- This usually takes place in a moist or wet place especially water bodies. The liquid medium will transport the sperm to the egg.
In cats, the female specie takes in reproductive cells from the male during coitus and it fertilizes the her eggs to produce a zygote.
To the person on top of me stop commenting that virus everywhere
Sexual reproduction is a process involving
the fusion of two gametes to form a zygote.
Gametes are special reproductive cells
produced by meiosis. It produces
genetically dissimilar offspring. Offspring
may inherit beneficial qualities from both
parents and there is a greater genetic
variation in the offspring, leading to species
that are better adapted to changes in the
environment.
I’m going to get my mama phone number and so
Answer:
C) B, secretor
D) B, Nonsecretor
E) A, secretor
F) A, nonsecretor
Explanation:
When you cross AB(codominant) with O(homozygote recessive), it will result in 50% A(IaIo) and 50% B(IaIo).
The secretor gene is dominant and both parents are a heterozygote, so the ratio of offspring genotype should be 1 : 2: 1 while the ratio of the phenotype will be 3 secretors: 1 nonsecretor.
The possible phenotype will be:
B nonsecretor
A secretor
A nonsecretor
B secretor
B nonsecretor