AP BIOLOGY

ANIMAL REPRODUCTION AND DEVELOPMENT

ASEXUAL REPRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which BEST describes sexual reproduction in all animals?
A
Egg and sperm join together
B
Pollen and seed join together
C
Offspring have traits of only one parent
D
Offspring are identical to one parent
Explanation: 

Detailed explanation-1: -Sexual reproduction is the production of a new organism from two parents by making use of their sex cells or gametes. In this process male gametes fuses with a female gamete to form a new cell called ‘zygote’. This zygote then grows and develops in to a new organism in due course of time.

Detailed explanation-2: -sexual reproduction, the production of new organisms by the combination of genetic information of two individuals of different sexes. In most species the genetic information is carried on chromosomes in the nucleus of reproductive cells called gametes, which then fuse to form a diploid zygote.

Detailed explanation-3: -Sexual reproduction starts with the combination of a sperm and an egg in a process called fertilization. This can occur either inside (internal fertilization) or outside ( external fertilization) the body of the female.

Detailed explanation-4: -Two major types of sexual reproduction are syngamy and conjugation. Syngamy refers to the fusion of haploid sex cells resulting in the formation of a diploid zygote. Thus, in essence, syngamy refers to fertilization. It is the most common type of reproduction in multicellular sexual populations, including humans.

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